来自汤伟平的问题
巧算:2000-1997+1994-1991+1988-1985+1982-1979+...+14-11+8-5+2
巧算:2000-1997+1994-1991+1988-1985+1982-1979+...+14-11+8-5+2
1回答
2020-03-23 02:02
巧算:2000-1997+1994-1991+1988-1985+1982-1979+...+14-11+8-5+2
巧算:2000-1997+1994-1991+1988-1985+1982-1979+...+14-11+8-5+2
原式={[(2000-2)/3]/2}*3+2=333*3+2=999+2=1001
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