Note: If you have an iPhone4 or iPhone5, please purchase Longhand Math instead of Longhand Addition. Longhand Math performs long addition, subtraction, multiplication and division -- you get the functionality of all four for the price of one, but it runs only on the iPhone4 and iPhone5.
Longhand Addition adds two multi-digit numbers, and if carrying was necessary, displays the numbers that were carried, just as you would add them column-by-column using a pencil and paper. All of the action occurs on one screen making it very simple to use. This application is great for elementary school students, their teachers, and their parents.