12345679*12345677/12345678解法12345679*12345677/12345678解法,要简便运算!

问题描述:

12345679*12345677/12345678解法
12345679*12345677/12345678解法,要简便运算!

12345677/12345678

=(12345678-1)(12345678+1)/12345678
=(12345678²-1)/12345678
=12345678-1/12345678