Improve your skills in mental arithmetic. When you have a few extra minutes, grab your iOS device and start the game. Do That Math is an engaging and entertaining game with questions that cover addition, subtraction, multiplication and division. Different answers fall down on the screen, but only one is correct. You have 90 seconds to play and every correct answer gives you higher score, but if you have three wrong answers, the game ends.
The first levels are easy enough for children aged from seven to twelve, but higher levels are challenging even for those who call themselves math geniuses. Example questions are:
* 4+2=?
* ?-12-2=20
* 18/?/3=2
* 3x15x?=90
* 5?3-2=13
Easy enough for mental arithmetic, but hard enough to fail when working under time pressure.
Good luck and remember "practice makes perfect"!!