27*26/17=(*代表乘号,26是分母,17是分子)简便计算.

问题描述:

27*26/17=(*代表乘号,26是分母,17是分子)简便计算.

27*26/17
=(26+1)*26/17
=26*26/17+26/17
=17+26/17
=17又26/17