Brain Training Calculation Master

Let's improve Math ability in your free time!  
Play and Repeat this practice, your calculation speed will be so much faster.
And, get quick wit with training your brain.

+Features 
- Practice addition, subtraction, and multiplication.
- The number of digits can be chosen from 1 to 4 digits.
- You can set up the number questions from 10, 30, 50, or 100 questions. 
- The number buttons arrangement is either "top to bottom", or "bottom to top".
- Calculation Character mode has standard Numerals system and PLUS, there are Chinese numeral system, Japanese numeral system and English numeral system. Chinese, Japanese and English version will use your brain more and possible to train quick wit.