Help Math Dog, AKA MathPup, catch the cat burglar. All you need to do is figure out the answer to the integer addition problem containing both positive and negative numbers. 3 skill levels to choose from and you can choose to play untimed for a leisurely game or select timed mode for more of a challenge. integer addition, math game, kids math, addition practice, negative numbers, positive numbers, math skills, puzzle, online math, educational game, MathDog, MathPup, number sense, problem solving, elementary math, quiz, mathematics, math skills practice