(7/13-3/4)-(-4/1+5/6)用分数形式算

问题描述:

(7/13-3/4)-(-4/1+5/6)用分数形式算

(7/13-3/4)-(-4/1+5/6)
=-11/42+19/6
=133/42-11/42
=122/42
=61/21