56×14/19 用简便算法怎么计算
问题描述：
56×14/19 用简便算法怎么计算
答
56×14/19
=(57-1)×14/19
=57×14/19 -1×14/19
=3×14-14/19
=42-14/19
=41+15/19
= 41又15/19