6.4×(7⼀4-1.25)×1⼀10的简便运算是什么?

2024-11-23 07:20:23
推荐回答(3个)
回答1:

6.4×(7/4-1.25)×1/10
=6.4×(1.75-1.25)×1/10
=6.4×0.5×1/10
=3.2×1/10
=0.32
所以,可以括号里面的7/4化为1.75,然后进行计算。

回答2:

原式
=6.4×(7/4-5/4)×1/10
=6.4×2/4×1/10
=6.4×1/2×0.1
=3.2×0.1
=0.32

回答3:

6.4×(7/4-1.25)×1/10
=6.4x(7/4-5/4)x1/10
=6.4x2/4x1/10
=6.4x0.5x0.1=0.32