1+2+3+4+5+6+5+4+3+2+1
----------------------------------【分数线】
666666x666666
人气:318 ℃ 时间:2020-05-19 02:59:49
解答
(1+2+3+4+5+6+5+4+3+2+1)/(666666×666666)
=(6×6)/(666666×666666)
=(6×6)/(6×111111×6×111111)
=1/(111111×111111)
=1/12345654321
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