(1/2003-1) (1/2002-1) (1/2001-1).(1/1000-1)
(1/2003-1)(1/2002-1)(1/2001-1)...*(1/1001-1)(1/1000-1)
(1/2003-1) (1/2002-1) (1/2001-1).(1/1000-1)
|1/2004-1/2003|+|1/2003-1/2002|+|1/2002-1/2001|+|1/2001-1/20
化简:|1/2004-1/2003|+|1/2003-1/2002|+|1/2002-1/2001|-|1/2001-1
(2002+2003*2001)/(2002*2003-1)简算
(2003/1-1)×(2002/1-1)×(2001/1-1)×.×(1001/1-1)×(1000/1-1)=?
1/1999×2000+1/2000×2001+1/2001×2002+1/2002×2003+1/2003×2004+
(1/2003—1)×(1/2002—1)×(1/2001—1)×...(1/1000—1)
(2003分之1-1)(2002分之1-1)(2001分之1-1)…(1000分之1-1)计算
1/2000*2001+1/2001*2002+1/2002*2003+1/2003
1/2000*2001+1/2001*2002+1/2002*2003+1/2003简便算法
1999*1998/1+1999*2000/1+2000*2001/1+2001*2002/1+2002*2003/1+