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Abacus - Wikipedia Abacus-based mental calculation (AMC), which was derived from the abacus, is the act of performing calculations, including addition, subtraction, multiplication, and division, in the mind by manipulating an imagined abacus
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 - 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
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
Abacus Explained — Everything You Need To Know - History Tools 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!
The Versatile, Venerable Abacus - CHM Revolution Perhaps the oldest continuously used calculating tool aside from fingers, the abacus is a masterpiece of power and simplicity Abacuses were widely used in Asia and Europe for centuries, and remain common today
The Abacus and the Numeral Frame - Smithsonian Institution The abacus is a computing device on which arithmetic calculations are performed by sliding counters (beads, pebbles, or flat discs) along rods, wires or lines The instrument may have originated in the Middle East before the time of Christ