191问答库 > 1.25×0.25×4×0.4的简便运算？

1.25×0.25×4×0.4的简便运算？

2025-03-16 06:09:02
推荐回答（3个）
回答1：

运用乘法交换律与乘法结合律可使运算简便.
1.25×0.25×8×0.4

＝1.25×8×0.25×4 乘法交换律
＝(1.25×8)×(0.25×0.4) 乘法交换律
＝10×0.1

＝1

回答2：

4×125=500
25×4=100
1.25×0.25×4×0.4=5×0.1=0.5

回答3：

最好要写，这个是结合律 字母表示：(a×b)×c=a×(b×c)
1.25×0.25×8×0.4
=（1.25x8）x（0.25x0.4）
=10x0.1
=1

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