Add and Subtract Numbers app for iPhone and iPad

Learning Happens Here!
Become addition and subtraction smart! You start the challenge by customizing the questions that randomly appear as part of the challenge. Or you can let the computer pick the questions for you.

- Each challenge has a set number of questions that are configured by you.
- You can choose whether the challenge should have addition only, subtraction only, or both addition and subtraction questions
- If you choose addition questions, you can choose if you want 2 number only, 3 number only, or 2 and 3 number questions
- And you can choose numbers from 1 to 10, 1 to 100, or 1 to 1000 for each number in the questions
- Or if you want a real challenge let the computer choose from each options for every question. One time you might get an addition question with 3 numbers with one number from 1 to 10, the other numbers from 1 to 1000. Or you might get a subtraction problem with two numbers between 1 and 1000. Its all randomly determined by the computer.
- Each question lets you use the carry method for addition and the borrow method for subtraction
- Answers are input using a special input method so that digits can be column by column ad they are figured out

The possibilities are endless. Become Math smart and head o the front of the class.