- Abacus - Wikipedia
An abacus consists of a two-dimensional array of slidable beads (or similar objects) In their earliest designs, the beads could be loose on a flat surface or sliding in grooves Later the beads were made to slide on rods and built into a frame, allowing faster manipulation
- 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
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- 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
- 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 - Math is Fun
The abacus has been around for thousands of years, and is still used in some parts of the world 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 | Encyclopedia. com
An abacus is a wooden or metal rectangular frame with vertical bars containing movable beads Prior to the advent of the abacus, stones were used as computational tools
- 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 Small stones known as calculi, from the Greek khalix, pebble, were moved along lines drawn in stone or sand Our modern terms “calculate” and
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