Question

Tính nhanh

a) 72. (-50).(-2).(-2)

b) 125.(-5).(-20).8

 

Answer 1

\(a,=72\cdot\left(-200\right)=-14400\\ b,=\left(125\cdot8\right)\left[\left(-5\right)\left(-20\right)\right]=1000\cdot100=1000000\)

Answer 2

= -14400

= 1000000

Answer 3

a)72.(-50).(-2).(-2)

= 72.[(-50).(-2)].(-2)

= 72. 100.(-2)

=7200.(-2)=-14400

b)=125.(-5).(-20).8

=(125.8).[(-5).(-20)]

=1000.100=100000

Answer 4

a,-14400

b,1000000