5/7除以9/2+7/9除以7/5 数学题

问题描述:

5/7除以9/2+7/9除以7/5 数学题

5/7÷9/2+7/9÷7/5
=5/7×2/9+7/9×5/7
=5/7×(2/9+7/9)
=5/7×1
=5/7.