Mathris is a fun math game that challenges kids to speed up their addition. Created in an arcade style, the app has a “Tetris” feel to it. Players are given a number before the game begins. They are then taken to a page where balls drop down to the screen with a variety of numbers. Add numbers by tapping them in order to come up with the sum of ten. Get as many as you can before the game ends, or the screen fills.
It's pretty simple, but for kids that are motivated to score high points in game play, this could be a perfect game to get them to increase their mental math skills and speed.
The app is free for the first level, with an in-app purchase of $0.99. No ads are displayed in the free version. For those with an iPad, the HD version is suggested. This is an OpenFeint enabled app. 8 achievements are offered each with 50 to 200 OpenFeint points.
Compatible with iPhone, iPad, and iPod touch.