1993 / 12346×12346-12345×12347的简便运算_数学解答

1993 / 12346×12346-12345×12347的简便运算

人气：125 ℃　时间：2020-04-08 11:40:06

解答

1993/(12345+1)*(12347-1)-12345*12347
=1993/(12345*12347+12347-12345-1-12345*12347)
=1993/1
=1993