【0.5+(2-0.75)】*1.6 要简便运算
问题描述：
【0.5+(2-0.75)】*1.6 要简便运算
答
(2/4+2-3/4)*1.6
=(2-1/4)*1.6
=3.2-0.4
答
【0.5+(2-0.75)】*1.6
=2.5*1.6-0.75*1.6
=4-1.2
=2.8