State whether the following are true or false and be prepared to prove it in class tomorrow:
1. The set of integers is closed under addition.
2. The set of whole numbers is closed under subtraction.
3. The set of rational numbers is closed under multiplication.
4. The set of rational numbers is closed under division.
5. The set of all non-zero rational numbers is closed under division.
See you tomorrow!
Mrs. D'Auria.
