125又5/9×1/5 用简便算法怎么解,
问题描述：
125又5/9×1/5 用简便算法怎么解,
答
125又5/9×1/5
=(125+5/9)×1/5
=125×1/5+5/9×1/5
=25+1/9
=25又1/9