简算:(1/69+2/71)×23+25/71 = = =

问题描述:

简算:(1/69+2/71)×23+25/71 = = =

(1/69+2/71)×23+25/71
=(1/69)×23+(2/71)×23+25/71
=23/69+(2×23+25)/71
=23/69+71/71 %约分
=1/3+1
=4/3答案是对的,可是,中间的步骤错了!不够简便?或许过了十多年,的确不适合做这所谓的简便运算了,或许口算是最简便的,倒是很想知道,还有哪里不够“简”呢