http://www.flashcardexchange.com/tag/subraction www.flashcardexchange.com: subraction Flashcards en-us Fri, 25 Jul 2008 11:21:02 PDT Fri, 25 Jul 2008 11:21:02 PDT support@flashcardexchange.com 720 http://www.flashcardexchange.com/flashcards/view/449006 Basic addition, subtraction. Fri, 16 Mar 2007 12:00:00 PDT http://www.flashcardexchange.com/flashcards/view/449006 http://www.flashcardexchange.com/flashcards/view/423859 Subtraction homework for my daughter. Thu, 11 Jan 2007 12:00:00 PST http://www.flashcardexchange.com/flashcards/view/423859