(9分之14×29+5分之58×29)×4分之5 能简便就简便

问题描述:

(9分之14×29+5分之58×29)×4分之5 能简便就简便

(14/9*29+58/5*29)*5/4
=[29*(14/9+58/5)]*5/4
=29*(70/45+522/45)*5/4
=29*592/45*5/4
=4292/9