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a: 3/121=6/242<6/241
b: 16/52=4/23
60/115=5/23
63/175=9/25
mà 4/23<5/23<9/25
nên 16/52<60/115<63/175
![](https://rs.olm.vn/images/avt/0.png?1311)
\(6^3:3^3=\left(6:3\right)^3\)\(\Rightarrow6^3:3^3=\left(6:3\right)^3\)
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a) \(6^3:3^3=216:27=8\)
\(\left(6:3\right)^3=2^3=8\)
Vậy \(6^3:3^3=\left(6:3\right)^3\)
b) \(10^2:5^2=100:25=4\)
\(\left(10:5\right)^2=2^2=4\)
Vậy \(10^2:25^2=\left(10:5\right)^2\)
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1)
a) 12 . 52 = 12 . 25 = 300
b) 704 : 82 = 704 : 64 = 11
c) 22 . 72 = 4 . 49 = 196
d) ( 96 : 24 )3 = 43 = 64
2)
a) 63 : 33 > ( 6 : 3 )3
b) 102 : 52 > ( 10 : 52 )2
3) ( không biết làm )
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a) 17 + 23 = 40; 23 + 17 = 40
=> 17 + 23 = 23 + 17
b) (12 + 28) + 10 = 40 + 10 = 50
12 + (28 + 10) = 12 + 38 = 50
=> (12 + 28) + 10 = 12 + (28 + 10)
c) 17.23 = 391; 23.17 = 391
=> 17.23 = 23.17
d) (5.6).3 = 30.3 = 90; 5.(6.3) = 5. 18 = 90
e) 23.(43+17) = 23. 60 = 1380
23.43 + 23.17 = 989 + 391 = 1380
=> 23.(43+17) = 23.43 + 23.17
![](https://rs.olm.vn/images/avt/0.png?1311)
\(6^3:3^3=\left(6:3\right)^3=2^3=8\)
\(\left(6:3\right)^3=2^3=8\)
=> \(6^3:3^3=\left(6:3\right)^3=2^3\)
\(102:5^2ko=\left(10:5\right)^2\)