Slide number tiles together to solve math puzzles! Sum Tracks is all about addition and subtraction. When you move a high-value square onto a lesser circle, the lower number will be subtracted. Combine different pieces to achieve new values and empty the puzzle!Sum Tracks is one of our selected Math Games. Also very popular on this website right now are 2048, Amigo Pancho 5, Piggy in the Puddle 2 and Monkey Go Happy Valentines.