Bài 1 rút gọn các phân số sau 49/28 85/51 64/96 1212/3030 32032/48048 1339/1442 huhuhu.....
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![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{1212}{3030}=\frac{2}{5}\)
\(\frac{32032}{48048}=\frac{2}{3}\)
\(\frac{456456}{234234}=\frac{76}{39}\)
\(\frac{1339}{1442}=\frac{13}{14}\)
#Châu's ngốc
![](https://rs.olm.vn/images/avt/0.png?1311)
1212/3030=1212:303/3030:303=4/10
32032/48048=32032:2002/48048:2002=16/21
456456/234234=456456:6006/234234:6006=76/39
16161616/38383838=16161616:2020202/38383838:2020202=8/19
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{1339}{1442}=\frac{13}{14}\)
\(\frac{1212}{3030}=\frac{2}{5}\)
\(\frac{1339}{1442}=\frac{1300+39}{1400+42}=\frac{13\times100+13\times3}{14\times100+14\times3}=\frac{13\times\left(100+3\right)}{14\times\left(100+3\right)}=\frac{13}{14}\)\(\frac{13}{14}\)
\(\frac{1212}{3030}=\frac{1200+12}{3000+30}=\frac{12\times100+12}{30\times100+30}=\frac{12\times\left(100+1\right)}{30\times\left(100+1\right)}=\frac{12}{30}=\frac{2}{5}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{1339}{1442}=\dfrac{1339:103}{1442:103}=\dfrac{13}{14}\)
\(\dfrac{1212}{3030}=\dfrac{1212:606}{3030:606}=\dfrac{2}{5}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{64}{96}=\frac{2}{3};\frac{90}{135}=\frac{2}{3};\frac{51}{85}=\frac{3}{5}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{16}{24}=\frac{2}{3}\)
\(\frac{35}{45}=\frac{7}{9}\)
\(\frac{49}{28}=\frac{7}{4}\)
\(\frac{85}{51}=\frac{5}{3}\)
\(\frac{64}{96}=\frac{2}{3}\)
![](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)
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