Subtraction School ! ! app for iPhone and iPad

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

Features of this version:
1) 1 to 6 digits
2) Random or custom user entered problems
3) Tutorial animation speed setting
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

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