通分:3/2和8/5,4/3和12/5,9/7和7/2(Y/T=y分之T)

问题描述:

通分:3/2和8/5,4/3和12/5,9/7和7/2(Y/T=y分之T)

3/2=(3×5)/(2×5)=15/10
8/5=(8×2)/(5×2)=16/10
4/3=(4×5)/(3×5)=20/15
12/5=(12×3)/(5×3)=36/15
9/7=(9×2)/(7×2)=18/14
7/2=(7×7)/(2×7)=49/14