Subtraction ! ! is a great way to learn and practice subtraction. From simple 1-digit problems to more advanced multi-digit problems, Subtraction ! ! will provide the user the necessary guidance and practice to master subtraction.

Features of the lite version:
1) 1 to 3 digits in each addend
2) Tutorial animation speed setting
3) User settings for up to 5 users
4) "Play Tutorial" button to show the step by step solution for each problem
5) "Hint" button for instructional guidance on current step
6) "Help" button for automatic completion of current step

The full version has more features:
1) 1 to 6 digits in each addend
2) Tutorial animation speed setting
3) Random or custom entered problems
4) User settings for up to 5 users
5) "Play Tutorial" button to show the step by step solution for each problem
6) "Hint" button for instructional guidance on current step
7) "Help" button for automatic completion of current step