-12.75x(-0.75)+(-1.75)X四分之三简便方法?发错了,是-2.75x(-0.75)+(-1.75)X四分之三简便方法

分类: 作业答案 • 2022-08-16 11:50:26

问题描述：

-12.75x(-0.75)+(-1.75)X四分之三简便方法?
发错了,是-2.75x(-0.75)+(-1.75)X四分之三简便方法

答

-2.75x(-0.75)+(-1.75)X四分之三
= -2.75*(-0.75)+1.75*(-0.75)
= -0.75*(-2.75+1.75)
= -0.75*(-1)
=0.75