- 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
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- Abacus - Math is Fun
Sometimes blind people will use an abacus, because they can feel the numbers easily Expert abacus users can sometimes do calculations faster than on a calculator, and can even use them to find the square root of whole numbers
- 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
- 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
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 | 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
- 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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