去括号:a+(b+c)=______;a+(-b+c)=______;a-(-b+c)=______;a-(-b-c)=______;2a+3(b-c)=______;2a-3(b-4c)=_____

题目简介

去括号:a+(b+c)=______;a+(-b+c)=______;a-(-b+c)=______;a-(-b-c)=______;2a+3(b-c)=______;2a-3(b-4c)=_____

题目详情

去括号:
a+(b+c)=______;
a+(-b+c)=______;
a-(-b+c)=______;
a-(-b-c)=______;
2a+3(b-c)=______;
2a-3(b-4c)=______.
题型:填空题难度:中档来源:不详

答案

a+(b+c)=a+b+c;
a+(-b+c)=a-b+c;
a-(-b+c)=a+b-c;
a-(-b-c)=a+b+c;
2a+3(b-c)=2a+3b-3c;
2a-3(b-4c)=2a-3b+12c.
故答案为:a+b+c;a-b+c;a+b-c;a+b+c;2a+3b-3c;2a-3b+12c.

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