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Kho sáng kiến kinh nghiệm và đề tài NCKHSPUD môn toán lớp 5 (Phần 1) - Toán chuyên đề

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<b><a href="http://toanchuyende.blogspot.com/search/label/Kho%20s%C3%A1ng%20ki%E1%BA%BFn%20kinh%20nghi%E1%BB%87m" rel="nofollow" style="color: #990000; text-decoration: none;" target="_blank">Kho sáng kiến kinh nghiệm toán lớp</a> 5</b></div>
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Bấm vào chữ "<b><span style="color: red;">Chi tiết</span></b>" để xem và tải về</div>
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Nguồn: Sưu tầm trên internet </div>
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Các SKKN, đề tài NCKHSPUD đã được kiểm duyệt nội dung, hình thức<br>
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Kho sáng kiến kinh nghiệm và đề tài NCKHSPUD môn toán lớp 5 (Phần 1) - Toán chuyên đề

Kho sáng kiến kinh nghiệm toán lớp 5 Bấm vào chữ " Chi tiết " để xem và tải về Nguồn: Sưu tầm trên internet Các ...

8:36 PM

Tuyển tập Đề tài NCKHSPUD Toán 5 - Phần V

Tuyển tập Đề tài NCKHSPUD Toán 5 - Phần V

Tuyển tập Đề tài NCKHSPUD Toán 5 – Phần V

8:35 PM

Sáng kiến kinh nghiệm toán Tiểu học: Kho sáng kiến kinh nghiệm-NCKHSPUD môn Toán Tiểu học (Phần I)

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Bấm vào chữ "<b><span style="color: red;">Chi tiết</span></b>" để xem và tải về</div>
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Nguồn: Sưu tầm trên internet </div>
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Các SKKN, đề tài NCKHSPUD đã được kiểm duyệt nội dung, hình thức</div>
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<b>Dowload SKKN: </b>Không cần đăng kí vẫn Dowload được các SKKN  toán Tiểu học  này</div>
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<b style="font-size: 15px; line-height: 21px;">Sử dụng: Dành cho bố mẹ tham khảo để dạy con, </b><span style="font-size: 15px; line-height: 21px;">Giáo viên tham khảo để học tập kinh nghiệm, in báo cáo chuyên đề toán, nộp SKKN, Viết tiểu luận PPDH toán tiểu học..</span></div>
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Sáng kiến kinh nghiệm toán Tiểu học: Kho sáng kiến kinh nghiệm-NCKHSPUD môn Toán Tiểu học (Phần I)

Kho sáng kiến kinh nghiệm Toán T iểu học Bấm vào chữ " Chi tiết " để xem và tải về Nguồn: Sưu tầm trên internet Các...

12:49 AM

DANH MỤC TÀI LIỆU MÔN TOÁN LỚP 5 – PHẦN 6

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<span data-mce-style="color: #0000ff;" style="color: blue;"><strong>DANH MỤC TÀI LIỆU MÔN TOÁN LỚP 5 – PHẦN 6</strong></span></div>
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<span data-mce-style="color: #0000ff;" style="color: blue;">Dưới đây là tài liệu dạy và học môn Toán lớp 5. </span><br>
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<span data-mce-style="color: #0000ff;" style="color: blue;">Tài liệu giúp giáo viên tham khảo trong dạy học toán 1, PHHS tham khảo để dạy con.</span></div>
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<span style="color: red;"><b>Không cần đăng ký đăng nhập, bạn vẫn có thể tải Tài liệu Toán 5</b></span></div>
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DANH MỤC TÀI LIỆU MÔN TOÁN LỚP 5 – PHẦN 6

DANH MỤC TÀI LIỆU MÔN TOÁN LỚP 5 – PHẦN 6 Dưới đây là tài liệu dạy và học môn Toán lớp 5. Tài liệu giúp giáo viên tham khảo trong ...

8:35 AM

150 bài toán chọn lọc lớp 4 - có giải chi tiết

150 bài toán chọn lọc lớp 4 - có giải chi tiết

CÁC BÀI TOÁN TIỂU HỌC CHỌN LỌC lop 4, 5 Bài 1 : Ngày 8 tháng 3 năm 2004 là thứ ba. Hỏi sau 60 năm nữa thì ngày 8 tháng 3 là thứ mấy ? ...

8:41 AM

101 bài toán so sánh phân số có đáp án và hướng dẫn giải chi tiết (Phần I)

$101 bài toán so sánh phân số có đáp án và hướng dẫn giải chi tiết (Phần I)$ 101 bài toán so sánh phân số có đáp án và hướng dẫn giải chi tiết (Phần I)

101 bài toán so sánh phân số có đáp án và hướng dẫn giải chi tiết (Phần I) Lưu ý: Để xem hướng dẫn giải chi tiết và đáp án, bấm vào chữ ...

10:05 AM

PP so sanh phân số: So sánh phần hơn

<div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="color: red; font-size: 12pt; line-height: 150%;">Trước khi làm bài:</span><span lang="FR" style="font-size: 12pt; line-height: 150%;"> </span><span lang="FR" style="font-size: 12pt; line-height: 150%;">Tìm phương pháp so sánh để áp dụng</span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">Bước 1. Nhận xét hai phân số cần so sánh<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">- Hai phân số đều < 1.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">- Hai phân số có hiệu giữa mẫu số và tử số bằng nhau.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="font-size: 12pt; line-height: 150%;"></span></div><a name="more"></a><br /><br /><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">Bước 2</span><span lang="FR" style="font-family: Arial; font-size: 12pt; line-height: 150%;"> </span><span lang="FR" style="font-size: 12pt; line-height: 150%;">: Kết luận phương pháp áp dụng <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">- áp dụng phương pháp so sánh phần bù.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="color: red; font-size: 12pt; line-height: 150%;">Làm bài:</span><span lang="FR" style="font-size: 12pt; line-height: 150%;"> </span><span lang="FR" style="font-size: 12pt; line-height: 150%;">Vận dụng quy tắc so sánh phân số ở mỗi phương pháp để tiến hành so sánh phân số.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%;"><span style="font-size: 12pt; line-height: 150%;">6. <span style="color: red;">So sỏnh hai phần hơn của hai phõn số với 1 <o:p></o:p></span></span></div><div class="MsoNormal" style="line-height: 150%;"><span style="color: red; font-size: 12pt; line-height: 150%;">6.1. Giải thớch:</span><span style="font-size: 12pt; line-height: 150%;"> Phần hơn của một phân số với 1 được hiểu là hiệu giữa phân số đó với 1.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-indent: 36.0pt;"><span style="color: red; font-size: 12pt; line-height: 150%;">Vớ dụ: phõn số </span><span style="font-size: 12pt; line-height: 150%;"><span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image002.gif" v:shapes="_x0000_i1025" width="16" /></span> có phần hơn  là <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image004.gif" v:shapes="_x0000_i1026" width="60" /></span><span style="color: red;"><o:p></o:p></span></span></div><div class="MsoNormal" style="line-height: 150%;"><span style="color: red; font-size: 12pt; line-height: 150%;">6.2. Phạm vi ỏp dụng: <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%;"><span style="color: red; font-size: 12pt; line-height: 150%;">- </span><span style="font-size: 12pt; line-height: 150%;">Thông thường, áp dụng khi cả hai phõn số lớn hơn 1. <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%;"><span style="color: red; font-size: 12pt; line-height: 150%;">- </span><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;">áp dụng cụ thể như sau:<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-indent: 36.0pt;"><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;">+ Đặt A = Tử số phân số thứ nhất  - Mẫu số phân số thứ nhất; <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-indent: 36.0pt;"><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;">+ Đặt B = Tử số phân số thứ hai  - Mẫu số phân số thứ hai; <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify; text-indent: 36.0pt;"><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;">Cách so sánh phần hơn được dùng khi A = B.</span><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;"> </span><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;">(Hiệu tử số trừ mẫu số của mỗi phân số bằng nhau)</span><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;"> <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify; text-indent: 36.0pt;"><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;">Nếu trong trường hợp A <span style="mso-text-raise: -2.0pt; position: relative; top: 2.0pt;"><img height="15" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image006.gif" v:shapes="_x0000_i1027" width="15" /></span>B ta có thể sử dụng tính chất cơ bản của phân số để biến đổi đưa về 2 phân số mới có hiệu giữa mẫu số và tử số của hai phân số bằng nhau.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%;"><span style="color: red; font-size: 12pt; line-height: 150%;">6.3. Quy tắc so sỏnh:</span><span style="font-size: 12pt; line-height: 150%;"> Phõn số nào cú phần hơn lớn hơn thỡ phõn số đú lớn hơn<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%;"><span style="color: red; font-size: 12pt; line-height: 150%;">6.4. Các bước tiến hành<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify; text-indent: 36.0pt;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">Bước 1:</span><span lang="FR" style="font-size: 12pt; line-height: 150%;"></span><span lang="FR" style="font-size: 12pt; line-height: 150%;">Tìm phần hơn.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify; text-indent: 36.0pt;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">Bước 2.</span><span lang="FR" style="font-size: 12pt; line-height: 150%;"></span><span lang="FR" style="font-size: 12pt; line-height: 150%;">So sánh phần hơn với nhau, kết luận.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%;"><span style="font-size: 12pt; line-height: 150%;">Vớ dụ 1.</span><span style="font-size: 12pt; line-height: 150%;"> So sỏnh hai phõn số:  <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image008.gif" v:shapes="_x0000_i1028" width="32" /></span>  và <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image010.gif" v:shapes="_x0000_i1029" width="31" /></span><o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="color: red; font-size: 12pt; line-height: 150%;">Bước 1. Trước khi làm bài:</span><span lang="FR" style="font-size: 12pt; line-height: 150%;"> Tìm phương pháp so sánh để áp dụng<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">1. Nhận xét hai phân số cần so sánh<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify; text-indent: 36.0pt;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">- Hai phân số đều > 1.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify; text-indent: 36.0pt;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">- Hai phân số có hiệu giữa tử số và mẫu số bằng nhau.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">2. Kết luận phương pháp áp dụng <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify; text-indent: 36.0pt;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">-  Từ nhận xét ở bước 1 => Kết luận: Để so sánh hai phân số trên ta có thể áp dụng phương pháp so sánh phần hơn c</span><span lang="FR" style="font-family: Arial; font-size: 12pt; line-height: 150%;">ủ</span><span lang="FR" style="font-size: 12pt; line-height: 150%;">a hai phân số đó.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="color: red; font-size: 12pt; line-height: 150%;">Bước 2. Tiến hành làm bài<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="color: red; font-size: 12pt; line-height: 150%;">1. Tìm phần hơn<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%;"><span style="font-size: 12pt; line-height: 150%;">- Phần hơn của  <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image008.gif" v:shapes="_x0000_i1030" width="32" /></span> là:  <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image008.gif" v:shapes="_x0000_i1031" width="32" /></span> - 1 = <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image013.gif" v:shapes="_x0000_i1032" width="31" /></span>                    <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%;"><span style="font-size: 12pt; line-height: 150%;">- Phần hơn của  <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image010.gif" v:shapes="_x0000_i1033" width="31" /></span>  là: <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image010.gif" v:shapes="_x0000_i1034" width="31" /></span>  - 1 = <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image015.gif" v:shapes="_x0000_i1035" width="31" /></span><o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%;"><span style="font-size: 12pt; line-height: 150%;">2. So sánh phần hơn, kết luận<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%;"><span style="font-size: 12pt; line-height: 150%;">Vỡ <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image013.gif" v:shapes="_x0000_i1036" width="31" /></span><<span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image015.gif" v:shapes="_x0000_i1037" width="31" /></span> nờn: <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image008.gif" v:shapes="_x0000_i1038" width="32" /></span><<span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image010.gif" v:shapes="_x0000_i1039" width="31" /></span><o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span style="font-size: 12pt; line-height: 150%;">Ví dụ 2:</span><span style="font-size: 12pt; line-height: 150%;"> So sánh: <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image021.gif" v:shapes="_x0000_i1040" width="40" /></span> và <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image023.gif" v:shapes="_x0000_i1041" width="40" /></span><o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="color: red; font-size: 12pt; line-height: 150%;">Bước 1. Trước khi làm bài:</span><span lang="FR" style="font-size: 12pt; line-height: 150%;"> Tìm phương pháp so sánh để áp dụng<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">1. Nhận xét hai phân số cần so sánh<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify; text-indent: 36.0pt;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">- Hai phân số đều > 1.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify; text-indent: 36.0pt;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">- Hai phân số có hiệu giữa tử số và mẫu số bằng nhau.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">2. Kết luận phương pháp áp dụng <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify; text-indent: 36.0pt;"><span lang="FR" style="font-size: 12pt; line-height: 150%;">-  Từ nhận xét ở bước 1 => Kết luận: Để so sánh hai phân số trên ta có thể áp dụng phương pháp so sánh phần hơn c</span><span lang="FR" style="font-family: Arial; font-size: 12pt; line-height: 150%;">ủ</span><span lang="FR" style="font-size: 12pt; line-height: 150%;">a hai phân số đó.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="FR" style="color: red; font-size: 12pt; line-height: 150%;">Bước 2. Tiến hành làm bài<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;">1. </span><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;">Tìm phần hơn<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify; text-indent: 36.0pt;"><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;">Ta có:<span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image025.gif" v:shapes="_x0000_i1042" width="111" /></span>                             <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image027.gif" v:shapes="_x0000_i1043" width="111" /></span>                         <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;">2.</span><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;"> So sánh phần hơn, kết luận<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify; text-indent: 36.0pt;"><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;">Vì <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image029.gif" v:shapes="_x0000_i1044" width="91" /></span> nên <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image031.gif" v:shapes="_x0000_i1045" width="91" /></span></span><span style="font-size: 12pt; line-height: 150%;"><o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span style="font-size: 12pt; line-height: 150%;">Các ví dụ khác:<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span style="font-size: 12pt; line-height: 150%;">Ví dụ 3:</span><span style="font-size: 12pt; line-height: 150%;"> So sánh hai phân số sau: <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image021.gif" v:shapes="_x0000_i1046" width="40" /></span> và <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image034.gif" v:shapes="_x0000_i1047" width="39" /></span></span><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;"><o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span style="font-size: 12pt; line-height: 150%;">Nhận xét, tìm phương pháp so sánh<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span style="font-size: 12pt; line-height: 150%;">- Hai phân số đều > 1; Giá trị của hiệu giữa tử số và mẫu số khác nhau<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span style="font-size: 12pt; line-height: 150%;">=> Biến đổi phân số trước khi áp dụng phương pháp so sánh phần hơn.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span style="font-size: 12pt; line-height: 150%;">Cụ thể cách giải như sau:<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span style="font-size: 12pt; line-height: 150%;">Ta có:</span><span style="font-size: 12pt; line-height: 150%;"> <span style="mso-text-raise: -15.0pt; position: relative; top: 15.0pt;"><img height="45" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image036.gif" v:shapes="_x0000_i1048" width="167" /></span><o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span style="font-size: 12pt; line-height: 150%;">Giá trị của phần hơn <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span style="font-size: 12pt; line-height: 150%;"><span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image038.gif" v:shapes="_x0000_i1049" width="109" /></span><o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image040.gif" v:shapes="_x0000_i1050" width="111" /></span><span style="font-size: 12pt; line-height: 150%;"><o:p></o:p></span></div><div class="MsoNormal" style="line-height: 150%; text-align: justify;"><span lang="PT-BR" style="font-size: 12pt; line-height: 150%;">Vì <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image042.gif" v:shapes="_x0000_i1051" width="89" /></span> nên <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image044.gif" v:shapes="_x0000_i1052" width="91" /></span> hay <span style="mso-text-raise: -12.0pt; position: relative; top: 12.0pt;"><img height="41" src="file:///C:/DOCUME~1/TUANCH~1/LOCALS~1/Temp/msohtml1/01/clip_image046.gif" v:shapes="_x0000_i1053" width="91" /></span><o:p></o:p></span></div><div class="MsoNormal"><br /></div><br /><div class="MsoNormal"><br /></div>

PP so sanh phân số: So sánh phần hơn

Trước khi làm bài: Tìm phương pháp so sánh để áp dụng Bước 1. Nhận xét hai phân số cần so sánh - Hai phân số đều < 1. - Hai phân số có h...

1:59 AM

Các bài toán về các phép tính phân số, tính nhanh về phân số - có đáp án và hướng dẫn giải chi tiết

<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDnCqiilsvBYrAiEgQiqez1hRUEmDkeOlQT3kZSahLhVc3msHCAZG__x0TGp9QIQC7L905X7NR-DJ5aPU4KuwiJye-nrhrlld6cr-LSVpZUuVr6Eh5lLNz-7udq1RysiwNf1W0g9N8H48/s1600/edu-mathematics-icon.png" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDnCqiilsvBYrAiEgQiqez1hRUEmDkeOlQT3kZSahLhVc3msHCAZG__x0TGp9QIQC7L905X7NR-DJ5aPU4KuwiJye-nrhrlld6cr-LSVpZUuVr6Eh5lLNz-7udq1RysiwNf1W0g9N8H48/s1600/edu-mathematics-icon.png" /></a></div><strong style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 16px; margin: 0px; padding: 0px;">Các bài toán về các phép tính phân số có đáp án và giải chi tiết</strong><br /><strong style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 16px; margin: 0px; padding: 0px;">Mô tả:</strong><br /><strong style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 16px; margin: 0px; padding: 0px;"><a href="http://toanchuyende.blogspot.com/" target="_blank">Toán chuyên đề: </a> </strong><strong style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 16px; margin: 0px; padding: 0px;">Các bài toán về các phép tính phân số</strong><br /><span style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 16px; margin: 0px; padding: 0px;">Phạm vi:</span><strong style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 16px; margin: 0px; padding: 0px;"> Toán 4, Toán 5, Toán 6.</strong><br /><span style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 16px; margin: 0px; padding: 0px;">Lưu ý</span><strong style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 16px; margin: 0px; padding: 0px;">: </strong><span style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 16px; margin: 0px; padding: 0px;">Bài toán có thể có nhiều cách giải, cách giải dưới đây chỉ là 1 trong những cách giải đó.</span><br /><a name="more"></a><br /><strong style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 16px; margin: 0px; padding: 0px;"><br /></strong><br /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; color: blue; font-size: small; line-height: 1.3em; margin: 0px; padding: 0px;"><strong style="border: 0px; margin: 0px; padding: 0px;">001.</strong></span><span style="font-size: small; line-height: 1.3em;"> Tính nhanh tổng sau : </span><img alt="1/2" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_8527aa1c344452312d975b15ac272533.png" style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/2" /><span style="font-size: small; line-height: 1.3em;"> + </span><img alt="5/6" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_bc67f7ef54f23d4c7f7d59cf607a2131.png" style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px; vertical-align: -19px;" title="5/6" /><span style="font-size: small; line-height: 1.3em;"> +</span><img alt="11/12" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_4cb1af9a4b24c0b040bc62646eea829b.png" style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px; vertical-align: -19px;" title="11/12" /><span style="font-size: small; line-height: 1.3em;"> + </span><img alt="19/20" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_1645dc59c30749f99e41a181ee58f3c0.png" style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px; vertical-align: -19px;" title="19/20" /><span style="font-size: small; line-height: 1.3em;"> + </span><img alt="29/30" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_174c756b159cd6dab601fa32d650b449.png" style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px; vertical-align: -19px;" title="29/30" /><span style="font-size: small; line-height: 1.3em;"> + </span><img alt="41/42" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_9d5b2840391073c7421e09c0584fd463.png" style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px; vertical-align: -19px;" title="41/42" /><span style="font-size: small; line-height: 1.3em;"> + </span><img alt="55/56" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_d0e94c0cb89aa9bd32bfc770f4ca9ec5.png" style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px; vertical-align: -19px;" title="55/56" /><span style="font-size: small; line-height: 1.3em;"> + </span><img alt="71/72" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_b8565fbb37563cfa161c8ec6e980fbb0.png" style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px; vertical-align: -19px;" title="71/72" /><span style="font-size: small; line-height: 1.3em;"> + </span><img alt="89/90" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_6e1fc579378dc4938236264a762f7b82.png" style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px; vertical-align: -19px;" title="89/90" /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: right;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><span style="border: 0px; color: blue; margin: 0px; padding: 0px;"><strong style="border: 0px; margin: 0px; padding: 0px;">002.</strong> </span>Tính nhanh: <strong style="border: 0px; margin: 0px; padding: 0px;"><img alt="(65+891+134+909)/(731-47+69-253)" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_968_fe0a431b16e0945ad70fb07561095c3c.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -32px;" title="(65+891+134+909)/(731-47+69-253)" /></strong></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: right;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><span style="border: 0px; color: blue; margin: 0px; padding: 0px;"><strong style="border: 0px; margin: 0px; padding: 0px;">003.</strong> </span>Tính nhanh: <img alt="(1991*1993 - 1)/(1990 + 1991*1992)" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_968_6b7a33379b920940070fb3a2473f133c.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -32px;" title="(1991*1993 - 1)/(1990 + 1991*1992)" /></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: right;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><span style="border: 0px; color: blue; margin: 0px; padding: 0px;"><strong style="border: 0px; margin: 0px; padding: 0px;">005.</strong></span> Cho phân số <img alt="9/11" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_900cc64fe868dd54f6256826504d1a36.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="9/11" />. Tìm một số tự nhiên để khi cộng số đó vào cả tử số và mẫu số thì được phân số có giá trị là <img alt="5/6" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_bc67f7ef54f23d4c7f7d59cf607a2131.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="5/6" />.</span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; color: #333333; font-family: arial, sans-serif; font-size: 16px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><span style="border: 0px; color: blue; margin: 0px; padding: 0px;"><strong style="border: 0px; margin: 0px; padding: 0px;">006.</strong> </span><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">Tính nhanh:</strong></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><img alt="4/1*3" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_006460ea6e81ab66684bd51e407cd1f9.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="4/1*3" /> + <img alt="4/3*5" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_2aedc5cca98cf25789c98c669b7ea0eb.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="4/3*5" />  + <img alt="4/5*7" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_138725f3d18b5ef35ce135d89bc54777.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="4/5*7" />  + ... + <img alt="4/11*13" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_89c9f844082cca8ecc16ad4922fbd038.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="4/11*13" /></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; color: #333333; font-family: arial, sans-serif; font-size: 16px;" /><div style="background-color: white; color: #333333; font-family: arial, sans-serif; font-size: 16px;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: justify;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><span style="border: 0px; color: blue; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">007.</strong></span><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> Cho phân số <img alt="7/6" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_2a9c7fcfc1b336defb6b9627be8891e3.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="7/6" /> và <img alt="1/9" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_e368105732dd5e5411430aa35270a989.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/9" />. Hãy tìm phân số <img alt="a/b" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_74e2ca20898189e5417a47246e07b4aa.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="a/b" /> sao cho thêm <img alt="a/b" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_74e2ca20898189e5417a47246e07b4aa.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="a/b" />  vào <img alt="1/9" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_e368105732dd5e5411430aa35270a989.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/9" /> và bớt <img alt="a/b" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_74e2ca20898189e5417a47246e07b4aa.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="a/b" /> ở <img alt="7/6" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_2a9c7fcfc1b336defb6b9627be8891e3.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="7/6" /> thì được hai phân số  mà phân số này gấp 3 lần phân số kia.</span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: right;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: justify;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><span style="border: 0px; color: blue; line-height: 1.3em; margin: 0px; padding: 0px;"><strong style="border: 0px; margin: 0px; padding: 0px;">008.</strong></span><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> Cho 2 phân số <img alt="4/5" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_370acdf86d649b56448b1265b79ee34a.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="4/5" /> và <img alt="5/8" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_df01158df9a2dbb93636ce37c38cd2b3.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="5/8" />. Hãy tìm phân số <img alt="a/b" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_74e2ca20898189e5417a47246e07b4aa.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="a/b" /> sao cho phân số <img alt="5/8" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_df01158df9a2dbb93636ce37c38cd2b3.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="5/8" /> cộng với <img alt="a/b" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_74e2ca20898189e5417a47246e07b4aa.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="a/b" /> và <img alt="4/5" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_370acdf86d649b56448b1265b79ee34a.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="4/5" /> trừ đi <img alt="a/b" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_74e2ca20898189e5417a47246e07b4aa.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="a/b" /> thì được 2 phân số mới mà phân số này lớn gấp 2 lần phân số kia.</span></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: justify;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; margin: 0px; padding: 0px;"><span style="border: 0px; color: blue; margin: 0px; padding: 0px;">009.</span> </strong><strong style="border: 0px; margin: 0px; padding: 0px;">Tính: </strong><img alt="1/2" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_8527aa1c344452312d975b15ac272533.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/2" /> + <img alt="1/6" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_e0b7f1b2a718dee5959b77bdff608832.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/6" /> + <img alt="1/12" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_8080d75f5f8b7ae81c63d4fa8cc62e6c.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/12" />+<img alt="1/20" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_0dcf5e95612d9c0aebf3dcc8bcd78fff.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/20" />+<img alt="1/30" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_73576023b63f629cc583b5e46f856e2d.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/30" />+<img alt="1/42" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_ac7e0d8a12ec23d21909c74318a195c0.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/42" /></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: justify;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"><span style="border: 0px; color: blue; margin: 0px; padding: 0px;">010.</span> Tính</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> <img alt="1/1*2" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_890b6f9b610966508b7f07a3117fdb78.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/1*2" /> + <img alt="1/2*3" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_24af61613107208b141024f17144edf5.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/2*3" /> + <img alt="1/3*4" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_8040b92a16d9da22743f62b9393b44e5.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/3*4" /> + <img alt="1/4*5" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_bfd16944586aca5972e20cb1ce60191e.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/4*5" /> + <img alt="1/5*6" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_771b993be243ba707c1c4af0d33ef971.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/5*6" /> + … + <img alt="1/10*11" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_4a0b5dc532b35600e4254bdf51d8594f.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/10*11" /> + <img alt="1/11*12" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_06c2201dd011d451d1ebdd78db0be022.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/11*12" /></span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: right;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><span style="border: 0px; color: blue; margin: 0px; padding: 0px;"><strong style="border: 0px; margin: 0px; padding: 0px;">011</strong>.</span><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px; text-align: justify;"> Tính A=</span><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"><img alt="1/3" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_a7bdee847d98966c8b35091a63de3085.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/3" /> + <img alt="1/9" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_e368105732dd5e5411430aa35270a989.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/9" /> +<img alt="1/27" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_b77cc4ff23867afc25f5e72220ad7f82.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/27" /> + <img alt="1/81" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_fb113678e896d8b2e530a75fa02dc116.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/81" /> + <img alt="1/243" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_15d0fd759ac48474768bda18da5c4939.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/243" /> +...+ <img alt="1/6516" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_de1cf4515e12af84570105bdd07f63f9.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/6516" /></span></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><strong style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px;">012.</strong><span style="border: 0px; font-size: small; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính A = <img alt="1/72" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_f994ae815e1f289b857e92640a049e99.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/72" /> + <img alt="1/56" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_38f5198b1599e3f408e62bf32fca6592.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/56" /> + <img alt="1/42" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_ac7e0d8a12ec23d21909c74318a195c0.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/42" /> + <img alt="1/30" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_73576023b63f629cc583b5e46f856e2d.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/30" /> + <img alt="1/20" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_0dcf5e95612d9c0aebf3dcc8bcd78fff.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/20" /> + <img alt="1/12" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_8080d75f5f8b7ae81c63d4fa8cc62e6c.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/12" /></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; line-height: 20px; margin: 0px; padding: 0px;">0</span><strong style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px;">14.</strong><span style="border: 0px; font-size: small; line-height: 1.3em; margin: 0px; padding: 0px;"> Tìm x:</span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;">10x(<img alt="1/1*2" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_890b6f9b610966508b7f07a3117fdb78.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/1*2" />+<img alt="1/2*3" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_24af61613107208b141024f17144edf5.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/2*3" />+<img alt="1/3*4" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_8040b92a16d9da22743f62b9393b44e5.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/3*4" />+<img alt="1/4*5" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_bfd16944586aca5972e20cb1ce60191e.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/4*5" />+<img alt="1/5*6" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_771b993be243ba707c1c4af0d33ef971.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/5*6" />) - x=0</span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">015.</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">  Tính nhanh :</span></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: justify;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"><img alt="5/6" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_bc67f7ef54f23d4c7f7d59cf607a2131.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="5/6" />+<img alt="11/12" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_4cb1af9a4b24c0b040bc62646eea829b.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="11/12" />+<img alt="19/20" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_1645dc59c30749f99e41a181ee58f3c0.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="19/20" />+<img alt="41/42" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_9d5b2840391073c7421e09c0584fd463.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="41/42" />+<img alt="55/56" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_d0e94c0cb89aa9bd32bfc770f4ca9ec5.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="55/56" />+<img alt="71/72" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_b8565fbb37563cfa161c8ec6e980fbb0.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="71/72" />+<img alt="89/90" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_6e1fc579378dc4938236264a762f7b82.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="89/90" /></span></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">016.</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> Tìm các chữ số a và b thỏa mãn: <img alt="1/3" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_a7bdee847d98966c8b35091a63de3085.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/3" /> = <img alt="1/a" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_0abc25c31fe828427fd69ab51bfcbc37.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/a" /> + <img alt="1/b" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_768095037a79c3ece117c7d09c9c9924.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/b" /></span></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; color: #333333; font-family: arial, sans-serif; font-size: 16px;"><span style="color: blue; font-size: small; font-weight: bold; line-height: 20.798612594604492px;"><br /></span></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">017.</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính tổng </span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;">S = <img alt="1/1*2" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_890b6f9b610966508b7f07a3117fdb78.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/1*2" /> + <img alt="1/2*3" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_24af61613107208b141024f17144edf5.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/2*3" />+<img alt="1/3*4" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_8040b92a16d9da22743f62b9393b44e5.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/3*4" />+… + <img alt="1/2004*2005" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_79e58f28919a1365da14fc85f2527662.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/2004*2005" /></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">018.</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính tổng</span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;">S=<img alt="1/9*10" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_db3eb8cffabe26e1db328736e76a94d3.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/9*10" />+<img alt="1/10*11" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_4a0b5dc532b35600e4254bdf51d8594f.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/10*11" />+…+<img alt="1/2004*2005" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_79e58f28919a1365da14fc85f2527662.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/2004*2005" /></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; color: #8da1ad; font-family: arial, sans-serif; font-size: 16px; height: 1px;" /><div style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><strong style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px;"><span style="border: 0px; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">019.</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính tổng</span></span></strong></div><div style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><strong style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px;">S=1/1x3 + 1/1x5 + ..... + 1/2003x2005</strong></div><div align="right" style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; border: 0px; font-family: arial, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><strong style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px;">020.</strong><span style="border: 0px; font-size: small; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính tổng 100 số hạng đầu tiên của dãy sau:</span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; line-height: 1.3em; margin: 0px; padding: 0px;"><img alt="1/1*2" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_890b6f9b610966508b7f07a3117fdb78.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/1*2" />; <img alt="1/ 2*.3" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_14d9219c40acef2b6f297687d81b31a1.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 2*.3" />;   <img alt="1/ 3*4" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_751e82bd79b6597af2115e5545de8522.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 3*4" />   ..........</span></div><div align="right" style="background-color: white; border: 0px; font-family: Arial, Helvetica, sans-serif; font-size: 16px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: -webkit-right;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">021.</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính tổng 100 số hạng đầu tiên của dãy sau:</span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><img alt="1/6" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_e0b7f1b2a718dee5959b77bdff608832.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/6" />; <img alt="1/ 66" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_bf39ab04ec05dea122c690cad81404cc.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 66" />; <img alt="1/ 176" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_1761326aa3c6c357e192f76b076ba5ca.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 176" /> ...</span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><strong style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px;">023.</strong><span style="border: 0px; font-size: small; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính tổngA = <img alt="1/10" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_324d0ddc77ae909ae130ac6c4e40830c.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/10" /> + <img alt="1/15" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_126464d4f4b3c6b615737bf933b7c920.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/15" /> + <img alt="1/21" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_6b6cde53b0188c69d7834e5c9a432995.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/21" /> + ... + <img alt="1/ 120" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_8bceddfa0ec3228457a997b6da0ff0f8.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 120" /></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; color: #333333; font-family: arial, sans-serif; font-size: 16px;"><span style="color: blue; font-size: small; font-weight: bold; line-height: 20.798612594604492px;"><br /></span></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">024.</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">  Tính tổng</span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><img alt="6/15*18" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_47d3cd83ea91fbda7e9635941ca28542.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="6/15*18" /> +<img alt="6/18*21" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_a7b9b489ea4c322a19446e0169def588.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="6/18*21" /> +<img alt="6/21*24" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_8ba6cecda77264b1f8fccc0f9c118767.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="6/21*24" /> +…+<img alt="6/87*90" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_224bf55c2ed06d41cd543595febf23b9.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="6/87*90" /></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: right;"><br /></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">025.</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính tổng</span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><img alt="1/25*27" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_5afa6f504825dd72042dde246a71eaaf.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/25*27" /> + <img alt="1/27*29" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_b234a2cb679e17b828249e8260afcc02.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/27*29" /> + <img alt="1/29*31" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_ec4cc0a18e2bd98cf5ab09be5e105191.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/29*31" /> + …+ <img alt="1/73*75" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_942f0e6ca34c5887734431f1dc3e6dda.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/73*75" /></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: right;"><br /></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><a href="http://www.school.net.vn/kien-thuc/toan-tieu-hoc/giai-toan-tieu-hoc/goog_111676990" rel="nofollow" style="color: rgb(0, 82, 20) !important;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">026.</strong></a><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"><a href="http://www.mediafire.com/?bp3fjk7ytya6t1a" rel="nofollow" style="color: rgb(0, 82, 20) !important;" target="_blank"> </a>Tính tổng</span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;">A = <img alt="15/90*94" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_608e35f72c4195bbd91b9f6be0f57643.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="15/90*94" /> + <img alt="15/90*98" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_c9d07be5408053d681009426573c67f6.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="15/90*98" /> + <img alt="15/98*102" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_d3211a3e339e701693a7110502b875ee.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="15/98*102" /> + … + <img alt="15/146*150" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_3b736b93532bece5648c3f3d34871937.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="15/146*150" /></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">027.</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính tổng</span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><img alt="1/ 2" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_c58d8198d37008cdc1abde5bdc3f7b98.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 2" /> + <img alt="1/ 4" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_99d5f662448d952e06a63b8cb9bc53b5.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 4" /> + <img alt="1/ 8" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_419a85b1e9b5de54db4a42cd1978c2ec.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 8" /> + <img alt="1/ 16" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_fa324324ceffa0620b3c75f06b19ba29.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 16" /> + <img alt="1/ 32" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_ff488049e570444be7621f6a9f74d19b.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 32" /> + <img alt="1/ 64" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_8abb35f202f8b0abc833790ac8e6645b.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 64" /></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">028.</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính tổng</span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><img alt="5/ 2" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_960a178861463b59206ddeee88b332a1.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="5/ 2" /> +<img alt="5/ 6" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_f923a0c6ab4a400707ffe5079f6158df.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="5/ 6" /> +<img alt="5/ 18" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_fce988fee49a64260d7c38f07f19b73a.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="5/ 18" /> +<img alt="5/ 54" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_498a4a663bd517109141885359b0d568.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="5/ 54" /> + 5/162+<img alt="5/ 486" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_2de0677bc9ed83fdf80744201a585ad2.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="5/ 486" /></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">029.</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính tổng</span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;">A  = <img alt="1/ 2*3" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_05c7b8f1f7c7632378195e7a5f12c3af.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 2*3" />+<img alt="1/ 3*4" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_751e82bd79b6597af2115e5545de8522.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 3*4" />+<img alt="1/ 4*5" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_8f3d5402fbaba2349e030578570d0259.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 4*5" />+<img alt="1/ 5*6" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_06d0ebd6499235aa58bf0876acaba6b9.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1/ 5*6" /></span></div><div align="right" style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">030.</strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính tổng</span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;">A = <img alt="3/ 2*5" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_643931ceaa6fa92a87be2bce6b299b2d.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="3/ 2*5" />+<img alt="3/ 5*8" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_ee41db57220c2f9aa40af2c3721f1898.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="3/ 5*8" />+<img alt="3/ 8*11" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_38c8521b2e6e4d7e73b734001e62ed17.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="3/ 8*11" />+<img alt="3/ 11*14" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_9be45390b04e4f891ec5b2eb19bfa35c.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="3/ 11*14" /></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: right;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><hr style="background-color: white; border-bottom-width: 0px; border-left-width: 0px; border-right-width: 0px; border-top-color: rgb(204, 204, 204); border-top-style: solid; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; height: 1px; line-height: 20px;" /><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><strong style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px;">031.</strong><span style="border: 0px; font-size: small; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính tổng</span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;">A  =  <img alt="4/ 1*3*5" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_8a5ac38d0eec06c9169c415022db5297.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="4/ 1*3*5" />+<img alt="4/ 3*5*7" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_18b524136707347698babb9b0c3e41ee.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="4/ 3*5*7" />+<img alt="4/ 5*7*9" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_e70c8faeab403b3216dd8c69f39b33c9.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="4/ 5*7*9" />+<img alt="4/ 7*9*11" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_ca0adb6ba58f3af57858fb5b718ad441.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="4/ 7*9*11" />+<img alt="4/ 9*11*13" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_82a6324e5a4a502deed50cc2491fc6ea.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="4/ 9*11*13" /></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: right;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><strong style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px;">032.</strong><span style="border: 0px; font-size: small; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính</span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><img alt="1991/ 1990" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_32a0b6c50baafd7563a6997ae1afbcaa.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1991/ 1990" />x<img alt="1992/ 1991" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_266d7ff6ad42d7ee86ffe2a9959af568.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1992/ 1991" />x<img alt="1994/ 1993" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_7de4e6627fcaf0a8f038fdff099429ab.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="1994/ 1993" />x<img alt="995/997" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_459f1ebc4a4ebfe52d2ad046614b3b08.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="995/997" /></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; color: red; font-size: small; margin: 0px; padding: 0px;"> </span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><strong style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px;">033.</strong><span style="border: 0px; font-size: small; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính:</span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;">(<img alt="2003*1999-2003*999" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_992.5_f4162e2f2e6ebcac4d27c7c95f02a804.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -7.5px;" title="2003*1999-2003*999" />)/(<img alt="2004*999+1004" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_992.5_b7e6a5f36bc844aab3fe7527132400c8.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -7.5px;" title="2004*999+1004" />)</span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px; text-align: right;"><br /></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; color: #333333; font-family: arial, sans-serif; font-size: 16px;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><strong style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">034. </strong><span style="border: 0px; line-height: 1.3em; margin: 0px; padding: 0px;">Tính:</span></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><img alt="(1996*1995-996)/(1000+1996*1994)" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_968_b66ad8ced494f1702eac3ffa068d4600.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -32px;" title="(1996*1995-996)/(1000+1996*1994)" /></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; color: red; margin: 0px; padding: 0px;"> </span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><strong style="border: 0px; font-size: medium; line-height: 1.3em; margin: 0px; padding: 0px;">035.</strong><span style="border: 0px; font-size: small; line-height: 1.3em; margin: 0px; padding: 0px;"> Tính</span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px;"><img alt="37/53" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_3d13c5ee4a37e505ca86fef997dd79d7.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="37/53" />x <img alt="23/48" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_1c39a45fa17562ba463a64784dc3f29c.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="23/48" />x <img alt="535353/373737" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_3a655664944403da100c3a608d69a3ee.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="535353/373737" />x<img alt="242424/232323" src="http://bantintuvan.com/plugins/content/MathPublisher/mathpublisher/img/math_981_4ca7f96ce33089a42cf6c3062f5908f8.png" style="border: 0px; margin: 0px; padding: 0px; vertical-align: -19px;" title="242424/232323" /></span></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div><div style="background-color: white; border: 0px; color: #333333; font-family: Arial, Helvetica, sans-serif; font-size: 12.222222328186035px; line-height: 20px; margin-bottom: 15px; margin-top: 15px; padding: 0px;"></div>

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