Simple addition and subtraction math problems. I Can Add will generate 2 numbers between 0 and 20 and you will either add or subtract those number. Just key in your answer and if it is correct, it will generate two more random numbers. If your answer is not correct, it will clear the answer and you can retry. If you give up, just hit clear and it will generate a new math problem v 0.2.0 - Added timed problems. Default is set for 2 minutes. Just click on timed and start answering your math problems. You can set it for up to 30 minutes. Largest number in the problems is still set at 20. I Can Add is good for testing your math skills, is fun and helps keep your memory sharp. 0.2.1 - added timer. Default is set for 2 minutes. You can go to about and change the timer from 1 to 30 minutes. It will tell you how many correct and how many wrong answers you made. At the start of the program, it will check and let you know if there are any new updates to the app.