Math Whiz plays like a video game and teaches like electronic flash cards. This portable ELA quizzes kids on addition, subtraction, multiplication or division AND works as a full-function calculator with the switch of a button. Problems are displayed on the LCD screen with eight skill levels as well as lights and sounds for instant feedback. Two AAA batteries required (not included). Press Challenge for a numbers elimination game. As random numbers scroll from left to right, keep pressing numbers that add up to 10 or 20 to eliminate them from the screen.