- Abacus - Wikipedia
An abacus (pl abaci or abacuses), also called a counting frame, is a hand -operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Hindu–Arabic numeral system [1] An abacus consists of a two-dimensional array of slidable beads (or similar objects)
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- How to Use an Abacus (with Pictures) - wikiHow
The abacus (the suanpan is the most useful variety) is a deceptively simple calculating tool still used all over the world It's a useful learning device for the visually impaired, as well as for anyone who wants to learn the roots of the modern calculator
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- Abacus | Definition, History, Origin, Facts | Britannica
Abacus, calculating device, probably of Babylonian origin, that was long important in commerce It is the ancestor of the modern calculating machine and computer The abacus was in universal use in Europe in the Middle Ages, as well as in the Arab world and in Asia
- Abacus Explained — Everything You Need To Know - History Tools
The abacus is one of the oldest calculating devices, used by ancient civilizations globally This comprehensive guide will explain what an abacus is, how it works, its fascinating history, why it remains popular today, and how learning abacus calculation can improve your math skills!
- Abacus - New World Encyclopedia
An abacus (plurals abacuses or abaci), also called a counting frame, is a calculating tool for performing arithmetical processes, often constructed as a wooden frame with beads sliding on wires The user, called an abacist, slides counters by hand on rods or in grooves
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