2001+2000-1999-1998+1997+1996-1995-1994+.+5+4-3-2+1
请把过程列出来.
人气:192 ℃ 时间:2019-09-29 01:38:00
解答
2001+2000-1999-1998+1997+1996-1995-1994+.+5+4-3-2+1
=2001+(2000-1999-1998+1997)+(1996-1995-1994+1993).+(4-3-2+1)
=2001+0+0+0+...0(有2000/4=500个0)
=2001
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