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e:
e1:40/-90=-4/9=-140/315
-70/-175=4/7=180/315
128/-1440=4/45=28/315
e2: 164/144=41/36
-936/-324=26/9=104/36
-860/720=43/36
![](https://rs.olm.vn/images/avt/0.png?1311)
− 51 136 = − 3 8 ; − 60 108 = − 5 9 ; 26 − 156 = − 1 6
− 3 8 = − 27 72 ; − 5 9 = − 40 72 ; − 1 6 = − 12 72
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− 165 270 = 11 18 ; − 91 156 = − 7 12 ; − 210 1134 = 5 27
11 18 = 66 108 ; − 7 12 = − 63 108 ; 5 27 = 20 108
![](https://rs.olm.vn/images/avt/0.png?1311)
rút gọn
\(\frac{9}{30}=\frac{3}{10};\frac{98}{80}=\frac{49}{40};\frac{15}{1000}=\frac{3}{200}\)
qui đồng
\(\frac{3}{10}=\frac{3.20}{10.20}=\frac{60}{200};\frac{49}{40}=\frac{49.50}{40.50}=\frac{2450}{200};\frac{3}{200}\)
học tốt
a: -15/90=-1/6=-5/30
120/600=1/5=6/30
-75/150=-1/2=-15/30
b: -54/90=-3/5=-216/360
-180/288=-5/8=-225/360
-60/135=-4/9=-160/360
c: 212121/353535=3/5=42/70
131313/141414=13/14=65/70