(5.15-3.25)*0.4+0.36的简便运算方法

分类: 作业答案 • 2021-12-19 11:34:17

问题描述：

答

(5.15-3.25)*0.4+0.36
＝(5.15-3.25)*0.4+0.9*0.4
=(5.15+0.9-3.25)*0.4
=(6.05-3.25)*0.4
=2.8x0.4
=1.12