39分之14除1.125+39分之25乘9分之8减9分之8

问题描述:

39分之14除1.125+39分之25乘9分之8减9分之8

14/39÷1.125+25/39×8/9-8/9
= 14/39×8/9+25/39×8/9-8/9
=﹙14/39+25/39-1﹚×8/9
=0.