0.79×12.5简便算

分类: 作业答案 • 2021-12-20 12:04:03

问题描述：

0.79×12.5简便算

答

0.79×12.5
=(0.8-0.01)×12.5
=0.8×12.5-0.01×12.5
=10-0.125
=9.875