1999乘以1999除以1998的简便运算

分类: 作业答案 • 2021-12-19 11:52:50

问题描述：

答

=（1998+1）×（1999/1998）
=1998×（1999/1998）+1999/1998
=1999+1999/1998
=2000又1/1998
这样做很简单吧

答

2000.00500500500500500500500500500500500500500500500500500500500500500500500500500500500500500500500500500500500500500500500500

答

=（1998+1）*（1999/1998）
=1998*（1999/1998）+1999/1998
=1999+1999/1998
=2000又1/1998