6.25*2.7+6.5*1.25的简便算法
问题描述：
6.25*2.7+6.5*1.25的简便算法
答
6.25×2.7+6.5×1.25
=1.25×5×2.7+1.25×6.5
=1.25×13.5+1.25×6.5
=1.25×(13.5+6.5)
=1.25×20
=25