Using the Gynzy problem generator, students will review the facts with a minuend of10 or less. This is followed by a discussion of using the inverse property of addition to recalling facts they already are familiar with. The students practice solving facts, then saying the inverse operation aloud. They check by listening to the answers. Next, the doubles addition facts are related to halving an even number when you subtract. Techniques of working with 9’s are covered with opportunities to practice. The lesson continues with a timed fact drill and timed flashcards.