(3.4-1.2×0.65）÷0.05的简便运算是怎样的?

分类: 作业答案 • 2022-02-21 19:20:13

问题描述：

答

(3.4-1.2×0.65）÷0.05
=(3.4-1.2×0.65）×20
=3.4×20-1.2×0.65×20
=68-1.2×13
=68-15.6
=52.4