1-2-3+4+5-6-7+8+......+97-98-99+100=( )。
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2010-08-20
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0=(1-2)-(3-4)....+(97-98)-(99-100)
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我乱猜的,不过我也想对了是……······················································································································································································0 啊!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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我想是0吧
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