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# 25. Nine-bead abacus and its uses

Updated: Feb 18, 2021

What is a nine-bead abacus? It is also a kind of abacus teaching aids. The abacus tools used by countries around the world to promote abacus education are all "one four bead" abacus. Compared with the "two-five-bead" abacus used by traditional Chinese in the past, the history of the nine-bead abacus maybe earlier. The earliest form of the abacus was not the existing Japanese abacus one-four beads in the decimal system, nor the traditional Chinese abacus two-five beads in the two-pound system. It is a simple decoration composed of various objects such as shells, stones, copper coins, wood, etc., and gradually forms fixed tools and calculators with the evolution of the times.

Therefore, some students are accustomed to learning nine beads and are unwilling to change back to 1, 4 beads is also feasible. Future courses, including mental arithmetic, multiplication and division, can be continued with nine beads. The purpose of learning abacus, if not for the pursuit of speed and advanced level, nine beads is also a good choice!

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