2001-2000+1999-1998+1997+……+5-4+3-2+1=?
问题描述:
2001-2000+1999-1998+1997+……+5-4+3-2+1=?
答
=2001+2000+1999+1998+1997+……+3+2+1=20032001
2001-2000+1999-1998+1997+……+5-4+3-2+1=?
=2001+2000+1999+1998+1997+……+3+2+1=20032001