7/12乘以2/3减去2/3乘以5/12怎么简算

问题描述:

7/12乘以2/3减去2/3乘以5/12怎么简算

2/3乘以(7/12减去5/12)=2/3乘以2/12=2/3乘以1/6=1/936乘以17/13减4/27的差,怎么简算