(204+584*1991/1992*584-380)-(1/143)
=(204+584*1991/1991*584+584-380)-(1/143)
=(204+584*1991/1991*584+204)-(1/143)
=1-1/143
=142/143先让我看看~别急采纳啊
(204+584*1991/1992*584-380)-(1/143)=?
(204+584*1991/1992*584-380)-(1/143)=?
数学人气：279 ℃时间：2020-01-25 05:43:15
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