13/8除以7+7/1乘13/2 简便算法

问题描述:

13/8除以7+7/1乘13/2 简便算法

13/8除以7+7/1乘13/2 简便算法
=13/8乘7/1+7/1乘13/2
=【13/8+13/2】乘7/1
=8.125乘7/1
=8.125乘7/1
=自己算

13/8除以7+7/1乘13/2
=13/8×7/1+7/1×13/2
=7/1×(13/8+13/2)
=7/1×13/10
=91/10

13/8除以7+7/1乘13/2
=13/8×7/1+7/1×13/2
=7/1×(13/8+13/2)
=7/1×13/10
=91/10

13/8除以7可以看做是乘7/1,简便算法就是 (13/8+13/2)乘7/1