1985/1986乘以9999简便运算.

遗失的木棉2022-10-04 11:39:541条回答

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ztxinyu 共回答了14个问题 | 采纳率85.7%
=9999*(1-1/1986) =9999*1-9999/1986 =9999-3333/662 =9999-(5+23/662) =9994-23/662 =9993+(1-23/662) =9993+639/662 =9993又662分之639
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