-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_数学解答

-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

人气：447 ℃　时间：2020-07-05 12:03:56

解答

-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