1993 / 12346×12346-12345×12347的简便运算

分类: 作业答案 • 2021-11-12 22:15:53

问题描述：

答

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