2001²-2001×1999

来源：学生作业学帮网 编辑：学帮网 时间：2024/05/15 05:28:08

2001²-2001×1999

2001²-2001×1999
=2001*2001-2001*1999
=2001*(2001-1999)
=2001*2
=4002

2001²-2001×1999
=2001×(2001-1999)
=2001×2
=4002

答：
2001²-2001×1999
=2001×(2001-1999)
=2001×2
=4002


2001²-2001×1999
=2001×(2001-1999)
=2001×2
=4002