2.25×五分之三+2.75÷一又三分之

问题描述:

2.25×五分之三+2.75÷一又三分之

2.25×五分之三+2.75÷一又三分之二
=2.25×五分之三+2.75×5分之3
=(2.25+2.75)×3/5
=5×3/5
=3