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
|=______.

|

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.