999999999×888888888 / 111111111简便运算_数学解答

999999999×888888888 / 111111111
简便运算

人气：444 ℃　时间：2020-05-28 07:48:49

解答

999999999×888888888 / 111111111
= 999999999*(888888888 / 111111111)
=(1000000000-1)*8
=1000000000*8-8
=8000000000-8
=7999999992