1985/1986乘以9999简便运算.

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1985/1986乘以9999简便运算.1985/1986乘以9999简便运算.1985/1986乘以9999简便运算.=9999*(1-1/1986)=9999*1-9999/1986=9999-3

1985/1986乘以9999简便运算.
1985/1986乘以9999简便运算.

1985/1986乘以9999简便运算.
=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