The soroban or counting tray is an abacus developed.It is derived from the ancient Chinese abacus (suanpan). The abacus is a calculating tool that was used for centuries before the adoption of the written modern numeral system. The abacus is still widely used by merchants, traders and clerks in certain parts of the world such as Asia and Africa. In addition to being a professional tool,the soroban or abacus is also an educational tool. The abacus is widely used in teaching children counting and mathematics. People who become proficient in the use of the abacus almost automatically become adept at mental calculation. Instructions are not included. This soroban abacus has a metal frame. Its classical,standard design allows for its ease of use as a professional and educational tool.
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