介绍
This game has a simple mechanism, but playing it is harder than you think! You are shown a simple equation (elementary arithmetic) and have a limited time to choose whether it is right or wrong. Every correct answer earns you one score and your final score is based on the number of your correct answers. If you chose wrongly or run out of time, you will lose!
教程
Use your mouse to play the game or tap on the screen
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