Who says math has to be boring? “Math Shot Add and Subtract within 20” mod apk is a math learning game with fun and engaging gameplay and as we all know learning through play and fun is more effective. Practice adding and subtracting within 20 in a new and fun way. The built-in handwriting recognition allows you to draw answers directly on the screen. The game difficulty dynamically adapts to player’s skills and makes the game suitable for all ages.