With three levels of difficulty this app to learn how to add and subtract is an educational way for primary school children to like math. From simple addition of a number at the easiest level to more complex operations to make learning to subtract a fun challenge. But if you're a math genius and want more, this math game for kids will make it a challenge by setting a countdown from 5 to 60 seconds. And if 10 moves aren't enough, modify the number to 100. Will you be able to respond before t