With PlusMinus you can easily practice your math exercises. In the settings can indicate whether you wish to add or subtract, or both. You can also specify how many exercises you wish to make.
If your answer is correct, you will get a nice message! Each exercise is repeated until you have given the right answer.
Now you can adjust the difficulty of the exercises to the learning level on school.
With Family Sharing set up, up to six family members can use this app.