Ok but has ads and in app purchase for values > 5
This might be ok if you're cheap and don't care about advertising
Good
Good app, my 5 year old finds it easy to use. I make him practice everyday and he is getting quicker 😁😁😁😁😁🌟🌟🌟🌟
Good subtraction practice
All the combinations are tested, so there's no gap.
