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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
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 - 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 Abacus and the Numeral Frame - National Museum of American History 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
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!
Abacus - Math is Fun An abacus has beads that slide on rods It can be used to count, add, subtract, multiply and more Slide 3 beads UP on the right-most column 1 bead UP on the 2nd-from-right
Abacus - Math. net An abacus, also referred to as a counting frame, is a device used to perform calculations Abaci (or abacuses) can be used to teach arithmetic, perform practical calculations, and more
Abacus | Encyclopedia. com The abacus, an ancient calculating device, probably originated in Babylon around 2400 B C E as a "counting box " It was the world's first calculator, and contemporary versions are still in use today