Hands-On Multiplication Division Kit Lakeshore LC166 Brand New Sealed It?s easy to solve complex multiplication and division problems?with this hands-on approach! Our kit includes a work tray, place value blocks and self-checking problem cards. Kids simply place a card in the handy well at the top of the tray and create an area model using the ones, tens and hundreds blocks?making it a breeze to visualize each problem and solve it. Each problem card shows the answer on back?so kids can check their own work as they go. Kit includes 60 ones cubes, 30 tens rods and 4 hundreds flats, plus 40 problem cards, a plastic tray and a guide. Tray measures 11" Develops skills in operations algebraic thinking and number operations in base 10.