Mental Math Brain Skills - Elementary Series - Two complete games using mental addition and subtraction and brain skills. Takes a minute to learn and the fun continues all year long. Two decks of card games have 28 cards each and are read out loud in a round robin reading style. Try to do each round in record time. Graph the results and watch your mental math brain skills improve. The two card games are not interchangeable. Each card has the answer to another card’s question, along with a new mental arithmetic problem to be solved. The activity continues until all the cards are read. Included is a listing of all the problems, with answers for each deck to facilitate the teacher’s reading and timing of the games. For grades 1-4 ISBN #0-9638483-1-3