去括号 (1) -(2m-3)=( )(2)n+(4-2m)=(3) a+(-b-1)=(4) d-2(3a-2b+3c)=

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去括号 (1) -(2m-3)=( )(2)n+(4-2m)=(3) a+(-b-1)=(4) d-2(3a-2b+3c)=
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去括号 (1) -(2m-3)=( )(2)n+(4-2m)=(3) a+(-b-1)=(4) d-2(3a-2b+3c)=
去括号 (1) -(2m-3)=( )
(2)n+(4-2m)=
(3) a+(-b-1)=
(4) d-2(3a-2b+3c)=

去括号 (1) -(2m-3)=( )(2)n+(4-2m)=(3) a+(-b-1)=(4) d-2(3a-2b+3c)=
(1) -(2m-3)=3-2m
(2)n+(4-2m)=n+4-2m
(3) a+(-b-1)=a-b-1
(4) d-2(3a-2b+3c)=d-6a+4b-6c
括号前边是-号,括号内都变号

(1)3-2m
(2)n+4-2m
(3)a-b-1
(4)d-6a+4b-6c

4+n-2m
a-b-1
6a+4b-3c+d