Brain mental arithmetic exercises (Traditional Chinese Cantonese/National Voice Effect), providing flashing (shadowing) and listening questions for abacus mental training. At the same time, it provides four kinds of additions to the abacus and four topical exercises.

In the test paper editor, there are 6 types of questions to choose from. Just enter the question option, you can get the corresponding random question, and you can also get the answer page of the question.

The two modes cater for different learning needs:
The "practice mode" provides a random source of endless questions for the accuracy of the answers to the questions.
The "challenge mode" requires that the most questions be completed within the specified time.

Through report analysis to understand the strengths and weaknesses of individual learning, so as to strengthen training more effectively.

In addition to the problem-solving exercises, the resulting PDF can also be printed or emailed for practice.

feature of product:
- Flash calculation (shadow calculation), calculation, and questions for abacus mental arithmetic
- Zhu Xin calculation straight questions, horizontal questions, abacus questions, bead questions
- Adjust the type and extent of the question as needed
- Report analysis helps understand and follow up on learning progress
- PDF test rolls that can be made offline
- Support multi-touch abacus or numeric keys to enter answers

**If you are interested in mental arithmetic interactive games and classes, please visit https://play.google.com/store/apps/details?id=com.hamsterforce.mindmaths