Tư vấn môi trường - Quan trắc môi trường - Thiết bị quan trắc: Toán 4

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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

Kho sáng kiến kinh nghiệm và đề tài NCKHSPUD môn toán lớp 4 ( 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 4</a></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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<div style="line-height: 21px; text-align: center; text-indent: 0px;">
<div style="text-align: right;">
Các SKKN, đề tài NCKHSPUD đã được kiểm duyệt nội dung, hình thức</div>
<div style="text-align: right;">
<b>Dowload SKKN: </b>Không cần đăng kí vẫn Dowload được các SKKN này</div>
<div style="text-align: right;">
<b>Sử dụng: Dành cho bố mẹ tham khảo để dạy con, </b>Giáo viên tham khảo để học tập kinh nghiệm, in báo cáo chuyên đề toán, nộp SKKN, Viết tiểu luận PPDH toán tiểu học....<br>
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Kho sáng kiến kinh nghiệm và đề tài NCKHSPUD môn toán lớp 4 ( Phần 1) - Toán chuyên đề

Kho sáng kiến kinh nghiệm toán lớp 4 Bấm vào chữ " Chi tiết " để xem và tải về Nguồn: Sưu tầm trên internet Các ...

5:44 PM

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

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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