17/5*24/9+17/9*24/7简便算法

问题描述:

17/5*24/9+17/9*24/7简便算法

17/5*24/9+17/9*24/7
=17/5*24/9+17/7*24/9
=(17/5+17/7)*24/9
=17/12*24/9
=34/9