去括号;a-(-b-c)=_____,-(q+b)+(c-b)=-______,-3(-x+2y)=?a+(b-c)=?a-(b+c)=?n-3(4-2m)=?先去括号,在合并同类项:(3x-1)-(3-5x)
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去括号;a-(-b-c)=_____,-(q+b)+(c-b)=-______,-3(-x+2y)=?a+(b-c)=?a-(b+c)=?n-3(4-2m)=?先去括号,在合并同类项:(3x-1)-(3-5x)
去括号;a-(-b-c)=_____,-(q+b)+(c-b)=-______,
-3(-x+2y)=?
a+(b-c)=?
a-(b+c)=?
n-3(4-2m)=?
先去括号,在合并同类项:
(3x-1)-(3-5x)
去括号;a-(-b-c)=_____,-(q+b)+(c-b)=-______,-3(-x+2y)=?a+(b-c)=?a-(b+c)=?n-3(4-2m)=?先去括号,在合并同类项:(3x-1)-(3-5x)
a-(-b-c)=a+b+c,
-(q+b)+(c-b)=-q-b+c-b=-q-2b+c,
-3(-x+2y)=3x-6y
a+(b-c)=a+b-c
a-(b+c)=a-b-c
n-3(4-2m)=n-12+6m
先去括号,在合并同类项:
(3x-1)-(3-5x)
=3x-1-3+5x
=8x-4
3x-6y
a+b-c
a-b-c
n-12+6m
3x-1-3+5x=3x-4+5x
去括号-(a-b+c)
试一试,去括号.(1)(a+b)+(c-d)=______;(2)(a+b)-(c-d)=______;(3)a+3(-b+c-d)=________;(4)a-3(-b+c-d)=__试一试,去括号.(1)(a+b)+(c-d)=_____;(2)(a+b)-(c-d)=_____;(3)a+3(-b+c-d)=_____;(4)a-3(-b+c-d)=_____.
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