In this application you will notice that it is not so easy to calculate, you can practice your math skills and your children can learn while having fun. The levels range from the most basic to complicated operations try it and see if you are or you are the one who teaches the learner.
The logic is to promote the interest mainly of children in learning mathematics. By repetitive application usage levels become easier in the measure used. Initially starts with an operation at a time (+, -, x, /) with basic numbers from 0 to 9 in a time of 30 seconds, as you progress the difficulty level will increase (Less time, higher number, fewer attempts to make mistakes)
Try it and see how good you are or how rusty these. The application is not just for kids because if you are an adult having fun watching you and your friends fail in such simple operations that even children can do.