计算|1/2009−1/2008|+|1/2008−1/2007|-|1/2009−1/2007|=_.
问题描述:
计算|
−1 2009
|+|1 2008
−1 2008
|-|1 2007
−1 2009
|=______. 1 2007
答
|
−1 2009
|+|1 2008
−1 2008
|-|1 2007
−1 2009
|1 2007
=
-1 2008
+1 2009
-1 2007
-1 2008
+1 2007
1 2009
=0.
故答案为:0.