(69分之2+71分之2)乘23+25除以71有什么简便算法?
问题描述:
(69分之2+71分之2)乘23+25除以71有什么简便算法?
答
(2/69+2/71)x23+25/71
=2/69x23+2/71x23+25/71
=2/3+(46/71+25/71)
=2/3+1
=5/3