(27*1.06+54*0.97)除以3的简便算法
问题描述:
(27*1.06+54*0.97)除以3的简便算法
答
(27*1.06+54*0.97)/3
=27/3*1.06+54/3*0.97
=9*1.06+18*0.97
=27