Posted by Diana on Monday, December 20, 2010 at 7:41pm.
If 10 is removed from the set of whole numbers, is the set closed with respect to addition? Explain why or why not.

math  drwls, Tuesday, December 21, 2010 at 1:16am
No, because without 10, some whole numbers in the set cannot be added to create another number in the set.