STOP! This is the math coach for children in primary school (from Group 3 and Group 4, and also suitable for group 5). Want to learn more mental arithmetic or to automate calculation sums still not easy, then enjoy playing with this fun app. This version contains several types of sums such as: - Addition sums, - Subtraction sums, - Multiplication tables (times tables) from 1 to 10, - Divisions. possibilities: - 90 levels; - Plus, minus, and part-sums; - Multiple choice questions; - Open question; - Check your input with survey results. The fun game contains 90 levels from easy to difficult. Simple and effective. Try to open the 90 levels. Intergrated with Google Play.