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1) Ta có : \(\frac{49}{28}=\frac{49:7}{28:7}=\frac{7}{4}\)
\(\frac{85}{51}=\frac{85:17}{51:17}=\frac{5}{3}\)
\(\frac{64}{96}=\frac{64:32}{96:32}=\frac{2}{3}\)
\(\frac{1212}{3030}=\frac{1212:606}{3030:606}=\frac{2}{5}\)
\(\frac{32032}{48048}=\frac{32032:16016}{48048:16016}=\frac{2}{3}\)
\(\frac{1339}{1442}=\frac{1339:103}{1442:103}=\frac{13}{14}\)
Bài 1 :
49/28 =7/4 85/51=5/3 64/96=2/3 1212/3030=2/5 32032/48048=2/3 1339/1442=13/14
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a,3/5 b,7/9 c,3/7 d,1/5 2/3 4/3 9/7 11/3 tick cho tui
6/10=3/5
70/90=7/9
9/21=3/7
24/120=1/5
24/36=2/3
96/72=4/3
45/35=9/7
121/33=11/3
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26/39 = 2/3
30/42 = 5/7
38/57 = 2/3
51/85 =3/5
39/65 = 3/5
20/28 = 5/7
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Bài 1 : Các số đó là : \(\frac{35}{60};\frac{46}{60}\)
Bài 2 :
\(\frac{12}{30}=\frac{12:6}{30:6}=\frac{2}{5}\); \(\frac{20}{45}=\frac{20:5}{45:5}=\frac{4}{9}\)
\(\frac{28}{70}=\frac{28:14}{70:14}=\frac{2}{5}\) ; \(\frac{34}{51}=\frac{34:17}{51:17}=\frac{2}{3}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{12}{30}=\frac{12:6}{30:6}=\frac{2}{5}\)
\(\frac{20}{45}=\frac{20:5}{45:5}=\frac{4}{9}\)
\(\frac{28}{70}=\frac{28:14}{70:14}=\frac{2}{5}\)
\(\frac{34}{51}=\frac{34:17}{51:17}=\frac{2}{3}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
20/50 + 5/15 72/90 + 7/28 32/96 + 8/28
= 2/5 + 1/3 = 4/5 + 1/4 = 1/3 + 2/7
= 11/15 = 21/20 = 13/21
\(\frac{20}{50}+\frac{5}{15}\\ =\frac{2}{5}+\frac{1}{3}\\ =\frac{6}{15}+\frac{5}{15}=\frac{11}{15}\)
\(\frac{16}{24}=\frac{2}{3}\)
\(\frac{35}{45}=\frac{7}{9}\)
\(\frac{49}{28}=\frac{7}{4}\)
\(\frac{85}{51}=\frac{5}{3}\)
\(\frac{64}{96}=\frac{2}{3}\)
16/24=2/3
35/45=7/9
49/28=9/4
85/51=5/3
64/96=2/3