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1+1/2007X1/2008-1/2007+1/2008
人气:307 ℃ 时间:2020-06-23 02:08:08
解答
1+1/2007×1/2008-1/2007+1/2008
=1+1/2007×1/2008-(1/2007-1/2008)
=1+1/2007×1/2008-1/2007×1/2008
=1
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