4/7乘以7/12,8/5乘以5/8,3/10乘于4/9,7/8乘以24/35,15乘9/20,5/12乘以36

问题描述:

4/7乘以7/12,8/5乘以5/8,3/10乘于4/9,7/8乘以24/35,15乘9/20,5/12乘以36

1/3 1 2/15额全部答案3/5 9/4 1515×9/20=27/4 开始算错了-_-||哦