简便0.999×1.3-0.111×2.7

分类: 作业答案 • 2021-12-28 17:42:44

问题描述：

答

0.999*1.3-0.111*2.7
=0.999*1.3-0.111*9*0.3
=0.999*1.3-0.999*0.3
=0.999*(1.3-0.3)
=0.999*1
=0.999