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数学
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2007×2006分之2005和11111×666666+77778×33333
求看得懂的
人气:216 ℃ 时间:2020-06-16 10:19:19
解答
2007×2005/2006
=2007×(2006-1)/2006
=2007×(1-1/2006)
=2007-2007/2006
=2005又2005/2006
11111×666666+77778×33333
=33333×222222+77778×33333
=33333×(222222+77778)
=33333×300000
=9999900000
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