Question

-5.25+2.2-｛-1.2-【-2分之1-（-0.75）】｝求大神帮助

Answer 1

-5.25+2.2-｛-1.2-【-2分之1-（-0.75）】｝ =-5.25+2.2-｛-1.2-【-2分之1+0.75】｝ =-5.25+2.2-｛-1.2+2分之1-0.75｝ =-5.25+2.2+1.2-2分之1+0.75 =-5.25+2.2+1.2-0.5+0.75 =-5.25-0.5+0.75+2.2+1.2 =-5.75+0.75+2.2+1.2 =-5+3.4 =-1.6