The Four Math Challenge

四是一个游戏的基础上的四个基本算术运算。

The Four Math Challenge is a math game based on the four basic arithmetical operations, addition, subtraction, multiplication and division.

Every time a new operation appears on the screen, you need to solve it before the time runs out! It’s easy in the beginning, but it’ll quickly put your brain to the test!

Challenge and share your result with you friends on Game Center, Facebook or Twitter.