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简算:9又2001分之2000乘1949
人气:406 ℃ 时间:2020-01-29 07:03:34
解答
9又2001分之2000乘1949
=(10-2001分之1)乘1949
=10×1949-1/2001×1949
=19490-1949/2001
=19489又52/2001
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