Use the table...
Choose the appropriate df, scroll over to the value of your test statistic, and the p-value will be 1-the subscript on the corresponding X^2.
Look up your test statistic.
There will be a corresponding " " at the top of the column.
Your p-value is 1-that p subscript....
Is this clear?
Example:
http://www.monarchwatch.org/grafx/read/eggs/table.gif
For test statistic = 1.32 and 1 df,
the p-value = 1-.25 = .75.