我要过程挖``````````````````(*+﹏+*)~@
问题描述:
我要过程挖``````````````````(*+﹏+*)~@
答
=0
答
1+2+5+6+9+10+...+2005+2006+2009-3-4-7-8-11-12-...-2007-2008=0
答
=(1+2-3)+(-4+5+6-7)+(-8+9+10-11)+.(-2004+2005+2006-2007)+(-2008+2009)
=1