Additions and Subtractions Publisher: congcong jin Genre: Puzzle Released: 29 Aug, 2017 Size: 12.8 MB Price: FREE! Click here to request a review of this app App Store Info Description Choose the arithmetic you want to challenge, react quickly to choose the right answer. Both test the player's arithmetic ability, but also test the player's agility. Quickly to the game to experience a quick sense of excitement it! Screenshots Screenshot 1 of 8