4-[(+3又4分之1)+(+2.75)] 怎么算
问题描述：
4-[(+3又4分之1)+(+2.75)] 怎么算
答
4-[(+3又1/4)+(+2.75)]
=4-[(13/4)+2.75]
=4-[3.25+2.75]
=4-6
=-2