Abacus

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This is an abacus designed for one-time printing with no supports required. To use it, simply turn the printed model over after printing, allowing the feet to face upwards for easy handling. The standard abacus features 4 balls valued at 1 each on every rod, along with a single ball worth 5 on each rod, across its 13 rods. This versatile calculating tool has been used by merchants, traders, and clerks in Asia, Africa, and other regions for centuries, long before the widespread adoption of modern written numerals. The printable version can be employed as a valuable teaching aid to help individuals develop mental arithmetic skills.