负3.25+3.75-4分子1+2.5+3又4分之3+负4又2分之1_数学解答

负3.25+3.75-4分子1+2.5+3又4分之3+负4又2分之1

人气：198 ℃　时间：2020-04-29 14:31:21

解答

-3.25+3.75-1/4+2.5+3+3/4-4-1/2
=-3.25+3.75-0.25+2.5+3+0.75-4-0.5
=-3.25-0.25+3.75+0.75+2.5-0.5+3-4
=-3.5+4.5+2+3-4
=2