nhanh lên nha mọi người

1/ 25 : 5.7

= 5.7

= 35

2/ 30 : 2.8.4

= 15.8.4

= 120.4

= 480

3/ 20 : $2^{2}$ .14

= 20 : 4.14

= 5.14

= 70

4/ 125 : $5^{3}$ .170

= 125 : 125 . 170

= 1.170

=170

5/ 64 : $2^{5}$ .30.4

= 64 : 32.30.4

= 2.30.4

= 60.4

= 240

6/ (25 : $5^{2}$ .30) : 15.7

= (25 : 25.30) : 15.7

= 30 : 15.7

= 2.7

= 14

7/ (64 : $2^{4}$ . 16) : 32.48

= (64 : 16.16) : 32.48

= 64 : 32.48

= 2.48

= 96

8/ (81 : $3^{3}$ .15) : 9.(40 : 8.2)

= (81 : 27.15) : 9.10

= 45 : 9.10

= 5.10

= 50

9/ [($5^{2}$ . 2 : 10).4] : ($2^{2}$ .5 : 2)

= [( 25.2:10).4] : (4.5 : 2)

= [5.4] : 10

= 20 :10

= 2

10/ (15 : 3.$5^{2}$ ) : (20 : $2^{2}$ )

= (15 : 3.25) : (20 : 4)

= 125 : 5

= 25

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