18*222.2-666.6怎样简便计算

分类: 作业答案 • 2021-12-28 18:20:18

问题描述：

答

18*222.2-666.6
=18x222.2-3x222.2
=(18-3)x222.2
=15x222.2
=3x5x222.2
=3x1111
=3333