化简:|1/2004-1/2003|+|1/2003-1/2002|+|1/2002-1/2001|-|1/2001-1/2000|

问题描述:

化简:|1/2004-1/2003|+|1/2003-1/2002|+|1/2002-1/2001|-|1/2001-1/2000|

=1/2003-1/2004+1/2002-1/2003+1/2001-1/2002-1/2000+1/2001
=2/2001-1/2004-1/2000