Train your brain with mental calculation to keep your mind sharp!
Mental calculation offers:
• 20 levels with 10 tasks in each of them
• 3 attempts to answer on every level
• if you give 3 incorrect answers, your current level will be downgraded
If you have any suggestions to make Mental Calculation app better, please, write email directly to petrosian.man.android@gmail.com
New cool app design.
9Apps 4.9
