MadMath: Cool Math Games is a free educational game for Android that challenges your mental calculation skills in a fun way. Developed by WestSloth Games, this game has two different math games: Addition Game and Multiplication Game.

The Addition Game trains your addition skills by requiring you to select numbers whose sum forms a given number. The Multiplication Game, on the other hand, trains your multiplication skills by requiring you to select one number which, multiplied by another number, forms a given result. Both games have a time limit for each assignment, which adds to the challenge.

The gameplay is simple and easy to understand. You can select and deselect numbers by tapping them, and when the sum or product of selected numbers matches the given value, you get some more score and a new result appears. MadMath: Cool Math Games also has leaderboards for both games, so you can compete with other players.

Overall, MadMath: Cool Math Games is a great way to exercise your math skills in a fun and challenging way. It provides a good practice for both adults and kids and becomes more difficult as the game progresses. If you want to improve your mental calculation skills, give MadMath: Cool Math Games a try!