如题所述
解:=(-1/10)+8(1/3)-11(2/3)+1/10
=8(1/3)-11(2/3)
=25/3-35/3
=-3(1/3)
解:=(-8/12)-1/12+3/12
=-6/12
=-1/2
解:=(-1/3)-(3/4)-(5/6)
=(-4/12)-(9/12)-(10/12)
=-23/12
=-1(11/12)