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Vintage Chinese Wooden Bead Arithmetic Abacus W. Instruction in Saudi Arabia Vintage Chinese Wooden Bead Arithmetic Abacus W. Instruction in Saudi Arabia Vintage Chinese Wooden Bead Arithmetic Abacus W. Instruction in Saudi Arabia Vintage Chinese Wooden Bead Arithmetic Abacus W. Instruction in Saudi Arabia Vintage Chinese Wooden Bead Arithmetic Abacus W. Instruction in Saudi Arabia

Vintage Chinese Wooden Bead Arithmetic Abacus W. Instruction

SAR 209

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Description

The abacus was a calculator invented sometime between 1000 BC and 500 BC in China, often constructed as a wooden frame with beads sliding on wires. It was in use centuries before the adoption of the written Hindu-Arabic numeral system and is still widely

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