2005分子2004乘以2003用简便法计算
人气:177 ℃ 时间:2020-01-28 02:41:58
解答
=(2004/2005)*2003
=(2004/2005)*(2005-2)
=(2004/2005)*2005-(2004/2005)*2
=2004-4008/2005=2002(2/2005)
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