计算:|1/2001-1/2000|-|1/2002-1/2000|+|1/2002-1/2001|

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计算:|1/2001-1/2000|-|1/2002-1/2000|+|1/2002-1/2001|计算:|1/2001-1/2000|-|1/2002-1/2000|+|1/2002-1/2001|

计算:|1/2001-1/2000|-|1/2002-1/2000|+|1/2002-1/2001|
计算:|1/2001-1/2000|-|1/2002-1/2000|+|1/2002-1/2001|

计算:|1/2001-1/2000|-|1/2002-1/2000|+|1/2002-1/2001|
原式=1/2000-1/2001-1/2000+1/2002+1/2001-1/2002=0

原式=1/2000-1/2001-1/2000+1/2002+1/2001-1/2002=0