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\(\frac{15-\frac{15}{7}-\frac{15}{2}}{3-\frac{3}{7}-\frac{3}{12}}\)
\(=\frac{15.\left(1-\frac{1}{7}-\frac{1}{2}\right)}{3.\left(1-\frac{1}{7}-\frac{1}{2}\right)}\)mình sửa đề luôn nhé
\(=\frac{15}{3}=5\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{15-\frac{15}{7}-\frac{15}{12}}{3-\frac{3}{7}-\frac{3}{12}}\)
\(=\frac{\frac{90}{7}-\frac{15}{12}}{\frac{18}{7}-\frac{3}{12}}\)
\(=\frac{\frac{325}{28}}{\frac{65}{28}}\)
\(=\frac{35}{17}\)
\(\frac{15-\frac{15}{7}-\frac{15}{12}}{3-\frac{3}{7}-\frac{3}{12}}\)
\(=\frac{\frac{90}{7}-\frac{15}{12}}{\frac{18}{7}-\frac{3}{12}}\)
\(=\frac{\frac{325}{28}}{\frac{65}{28}}\)
\(=5\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{15-\frac{15}{7}-\frac{15}{12}}{3-\frac{3}{7}-\frac{3}{12}}\)
= \(\frac{15.\left(1-\frac{1}{7}-\frac{1}{12}\right)}{3.\left(1-\frac{1}{7}-\frac{1}{12}\right)}\)
= \(\frac{15}{3}\)
= 5
![](https://rs.olm.vn/images/avt/0.png?1311)
\(15-\frac{15}{7}-\frac{15}{12}=11\frac{17}{28}\)
\(=\frac{325}{28}\)
\(3-\frac{3}{7}-\frac{3}{13}=2\frac{31}{91}\)
\(=\frac{213}{91}\)
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https://vn.answers.yahoo.com/question/index?qid=20100907070553AAEawEd
lời giải rõ ràng rồi đó bạn ^_~
\(\frac{15-\frac{15}{7}-\frac{15}{12}}{3-\frac{3}{7}-\frac{3}{12}}\)
\(=\frac{15\left(1-\frac{1}{7}-\frac{1}{12}\right)}{3\left(1-\frac{1}{7}-\frac{1}{12}\right)}\)
\(=\frac{15}{3}\)
K nha
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài làm :
Ta có :
\(\frac{15-\frac{15}{7}-\frac{15}{12}}{3-\frac{3}{7}-\frac{3}{12}}\)
\(=\frac{15.\left(1-\frac{1}{7}-\frac{1}{12}\right)}{3.\left(1-\frac{1}{7}-\frac{1}{12}\right)}\)
\(=\frac{15}{3}\)
\(=5\)
Bài làm :
\(\frac{15-\frac{15}{7}-\frac{15}{12}}{3-\frac{3}{7}-\frac{3}{12}}\)
\(=\frac{15.\left(1-\frac{1}{7}-\frac{1}{12}\right)}{3.\left(1-\frac{1}{7}-\frac{1}{12}\right)}\)
\(=\frac{15}{3}=5\)
Học tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 2. > , < , = ?
5/7 < 4/3 2/5 < 6/10 1/4 = 3/12 27/36 >
2/9 7/6 > 7/9
7/2 = 2/7 15/23 < 1 27/9 > 2 14/15 < 1 51/17 < 4
Đáp số : 0