8/7÷4/21= 3/25*5/9= 2/3-1/2= 24*(7/12+1/8)=

问题描述:

8/7÷4/21= 3/25*5/9= 2/3-1/2= 24*(7/12+1/8)=

8/7÷4/21=6
3/25*5/9= 1/15
2/3-1/2=1/6
24*(7/12+1/8)=27

8/7÷4/21=8/7×21/4=6
3/25*5/9= 1/15
2/3-1/2=4/6-3/6=1/6
24*(7/12+1/8)=14+3=17