4×0.8×12.5×0.2简便运算
1个回答
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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