1985/1986*9999 的简便运算._数学解答

1985/1986*9999 的简便运算
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人气：386 ℃　时间：2020-03-22 05:31:04

解答

=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