(-3分之2)+0+(+4分之1)+(-6分之1)+(-2分之1)
=-2/3+1/4-1/6-1/2=-13/12
(-3分之2)-(-1又4分之3)-(1又3分之2)+(1.75)=-2/3+7/4-5/3+7/4=(-2/3-5/3)+7/2=7/6
(-3又3分之2)-(-2又4分之3)-(-1又3分之2)-(1.75)=-11/3+11/4+5/3-7/4=(-11/3+5/3)+(11/4-7/4)=-2+1=-1
满意望采纳,不懂可追问
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