This brain game gives you:
Memory, attention, and math skills improvement.
Speeds up your ability to perform calculations right and quickly.
Improves your focus and concentration.
Your goal is to calculate the flying numbers at given time.
Each new level gives a new challenge to your brain cells.
Boosts your overall mental power and performance.
So take your brain cells for a walk and give them some exercise.
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微积分 - 大脑训练器