写得数.8/9÷4 1÷2/3 2/5÷3 14÷7/15 5/2÷0.4 5/8÷3/8 3/8÷9/16 6/7÷14/9

问题描述:

写得数.8/9÷4 1÷2/3 2/5÷3 14÷7/15 5/2÷0.4 5/8÷3/8 3/8÷9/16 6/7÷14/9

8/9÷4 =8/9×1/4=2/91÷2/3 =1×3/2=3/22/5÷3 =2/5×1/3=2/1514÷7/15 =14×15/7=305/2÷0.4 =5/2×5/2=25/45/8÷3/8 =5/8×8/3=5/33/8÷9/16 =3/8×16/9=2/36/7÷14/9=6/7×9/14=27/49