Question

4×0.8×12.5×0.2简便运算

Answer 1

4×0.8×12.5×0.2
=4×（0.8×12.5）×0.2
=4×（10×0.2）
=4×2
=8

题目主要运用的是乘法交换律，交换之后运算方便多了

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Answer 2

简便运算：4×0.8×12.5×0.2
=4X12.5X0.2X0.8
=50X0.2X0.8
=10X0.8
=8

Answer 3

4×0.8×12.5×0.2
=(0.8×12.5)×(4×0.2)
=10×0.8
=8

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Answer 4

4×0.8×12.5×0.2
=4×12.5×0.8×0.2
=50x0.8x0.2
=40x0.2
=8

Answer 5

=(0.8×12.5)×(4×0.2)
=10×0.8
=8