计算|1/2005-1/2004|+|1/2004-1/2003|-|1/2005-1/2003|=几?是一道数学题,我们今天的作业,

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计算|1/2005-1/2004|+|1/2004-1/2003|-|1/2005-1/2003|=几?是一道数学题,我们今天的作业,

计算|1/2005-1/2004|+|1/2004-1/2003|-|1/2005-1/2003|=几?是一道数学题,我们今天的作业,
计算|1/2005-1/2004|+|1/2004-1/2003|-|1/2005-1/2003|=几?
是一道数学题,我们今天的作业,

计算|1/2005-1/2004|+|1/2004-1/2003|-|1/2005-1/2003|=几?是一道数学题,我们今天的作业,
l1/2005-1/2004l+l1/2004-1/2003l-l1/2005-1/2003l
=(1/2004-1/2005)+(1/2003-1/2004)-(1/2003-1/2005)
=1/2004-1/2005+1/2003-1/2004-1/2003+1/2005
=0