This is a simple, interesting, attractive mathematical game. It has multiple mode. It not only needs your intelligence but also your speed, in addition to bring happiness to you, still can exercise your mathematical operation ability, enhance the intelligence level.
Good background mechanism, let you can pause the game at any time, and play when you are free.
Intelligent algorithm makes the game difficulty to be automatically grow, and at the same time, also guarantee the arithmetic expression never repeats in each round of the game.