SEMPOA

Sempoa is one of tool for calculate. There are many kinds of sempoa.
For example:
1. Sempoa Rusia (Russian Abacus)
Kind of Russian Abacus is called " tsouchottii ", content of 10 seeds in each line. The first line is unit. The second line is tens etc. This tool is used to by the students of elementary school. There are many weakless of this sempoa.
2. Sempoa China ( SUAN PAN)
Each line of this sempoa content of two seeds above and five seeds below. Sempoa china is used for changer of calculator. It used in the shops.
3. Sempoa Jepang (SOROBAN)
Soroban content of one seed above and four seeds below. This sempoa usually used by many people in the world include Indonesian. It is be able to practice logically think of children.