This app is designed to provide a fun and effective learning environment in which kids can learn and have fun at the same time.The addition game and subtraction game section are divided into different levels, easy level, intermediate level and hard level.In each level you will find different games for the child will learn to add and subtract gradually. This application is designed for when the child clicks on the correct number it turns green and if turns red it is an error.The child will have to click on the correct number in each addition and in each subtraction, and if he succeeds, he can move on to the next one.When the child clicks on the correct choice in addition or subtraction, if it is correct it turns green. To continue the child will have to click on the next button.In this way, the child will complete all the operations alone because the app tells you at all times if your answer is correct or if you made a mistake.