0.89×12.5-0.9×1.25的简便计算

分类: 作业答案 • 2022-01-07 12:15:29

问题描述：

答

0.89×12.5-0.9×1.25
=0.89×12.5-0.09×12.5
=(0.89-0.09)×12.5
=0.8×12.5
=10