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2009*2010-1/2009*2009+2008 简算 急!
2009x2010-1
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2009x2009+2008 快!简便算法!要详细的过程
人气:307 ℃ 时间:2020-03-28 08:30:40
解答
(2009*2010-1)/(2009*2009+2008)
=(2009*2009+2009-1)/(2009*2009+2008)
=1
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