来自常红星的问题
(2m-3)+m-(3m-2).先去括号,再合并同类项
(2m-3)+m-(3m-2).先去括号,再合并同类项
1回答
2020-01-02 08:23
(2m-3)+m-(3m-2).先去括号,再合并同类项
(2m-3)+m-(3m-2).先去括号,再合并同类项
=2m-3+m-3m+2
=(2m+m-3m)+(-3+2)
=-1