1st level of the Hooked on Math series! Hooked on Math Addition and Subtraction starts kids ages 6 to 7 with basic addition and subtraction and progresses to regrouping larger numbers. Through musical audio CDs, flash cards, and workbooks filled with fun lessons and activities, kids begin to build a solid foundation in the math skills they need to succeed in school. Plus, with original games like Space Bingo that use play money and game pieces, kids have a fun way to reinforce the key math concepts learned.