STOP! This is the math coach for people who want to be a Math Master. 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 - Counting: Count numbers from 1 to 20 and more. - Comparison: Learn comparison concepts. - Addition: Add a single digit number to another number and more numbers all together. - Subtraction: Subtract a single digit number from another number. - Time: Learn to timebox an exercise. Simple and effective.