Math 7 Classes: Wksht 6-7B at http://docs.google.com/Doc?docid=0AWefHHwrzo7bZGhyN2N4d2NfODExY3p3YnpnYzU&hl=en For extra credit - bring in an interest rate with a picture!
Pre-Algebra Classes: Wksht 8-2 both sides at http://docs.google.com/Doc?docid=0AWefHHwrzo7bZGhyN2N4d2NfNzk3Z3RwYjZxZjg&hl=en and http://docs.google.com/Doc?docid=0AWefHHwrzo7bZGhyN2N4d2NfODA0Z3M4OGJtZms&hl=en
