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2004/2005*2006 用简便方法计算,
人气:178 ℃ 时间:2019-12-13 10:58:12
解答
2004/2005 ×2006
=2004/2005 ×(2005 + 1)
= 2004/2005 ×2005 + 2004/2005×1
= 2004 + 2004/2005
= 2004又 2004/2005
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