①6.13-(10.13-10分之13)
=6.13-10.13+1.3
=-4+1.3
=-2.7
②2分之1-[4分之3-(4分之1+5-2分之1)]
=0.5-(0.75-0.25-5+0.5)
=0.5+4
=4.5
③0.5-(-1又5分之2+10分之3-4分之1-0.5)
=0.5+1.4-0.3+0.25+0.5
=2.35
①6.13-(10.13-10分之13)
=6.13-10.13+1.3
=-4+1.3
=-2.7
②2分之1-[4分之3-(4分之1+5-2分之1)]
=0.5-(0.75-0.25-5+0.5)
=0.5+4
=4.5
③0.5-(-1又5分之2+10分之3-4分之1-0.5)
=0.5+1.4-0.3+0.25+0.5
=2.35