This app is designed to offer a fun and effective learning environment in which children can learn while they are having fun. In the Sums Game section and the Subtraction Game you will find the different levels at which the game is divided: easy level, intermediate level and difficult level. In each one of the levels you will find differents games that the child will gradually learn to add because this app is designed so that pressing on a number this is lit in red color if the answer is a mi