38.2x7.5+75+0.75x5.18如何简便方法运算?

分类: 作业答案 • 2022-06-23 12:15:30

问题描述：

答

38.2x7.5+75+0.75x5.18
=38.2x7.5+10x7.5+7.5x51.8
=7.5x(38.2+10+51.8)
=7.5x100
=750