(1.5*1.25+1.75*1.5)*5 简便运算
问题描述：
(1.5*1.25+1.75*1.5)*5 简便运算
(1.5*1.25+1.75*1.5)*5 是简便运算,
答
(1.5*1.25+1.75*1.5)*5
=1.5*(1.25+1.75)*5
=1.5*3*5
=4.5*5
=22.5