Practise column additions and subtractions with Math Loops + With and without carrying or borrowing. Handwrite the numbers, one by one, as if it was a real paper worksheet. Even better: You can use the whole pad to write each number! Math Loops + will identify and check your numbers as you handwrite them. It will highlight your mistakes as you are solving the exercise. It will show and correct up to two mistakes in each addition or subtraction. One more mistake... and you have to start it over