Abacus - определение. Что такое Abacus
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Что (кто) такое Abacus - определение

CALCULATING TOOL
AbacuS; Abacus arithmetic; Nepohualtzintzin; Abacus (Aztec); Bead frame; Abacus (mathematics); Abacus Calculation; Abbacus; Abacuses; Abacist; Counting frame; Counting frames; Abacists; Russian abacus; Abaci; Cranmer abacus; Reckoning frame; Abakus; 🧮; Draft:Math Genie; Abacus mathematics; Schoty
  • Chinese abacus
  • Two binary abacuses constructed by Robert C. Good, Jr., made from two Chinese abacuses
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  • Early 20th century abacus used in Danish elementary school.
  • Representation of an [[Inca]] [[quipu]]
  • Copy of a [[Roman abacus]]
  • Russian schoty
  • Japanese [[soroban]]
  • A twenty bead ''[[rekenrek]]''
  • A [[yupana]] as used by the Incas.

abacus         
n. to operate, use an abacus
abacus         
['ab?k?s]
¦ noun (plural abacuses)
1. a frame with rows of wires or grooves along which beads are slid, used for calculating.
2. Architecture the flat slab on top of a capital, supporting the architrave.
Origin
ME: from L., from Gk abax, abak- 'slab, drawing board', of Semitic origin.
Abacus         
·noun A tablet, panel, or compartment in ornamented or mosaic work.
II. Abacus ·noun A table or tray strewn with sand, anciently used for drawing, calculating, ·etc.
III. Abacus ·noun The uppermost member or division of the capital of a column, immediately under the architrave. ·see Column.
IV. Abacus ·noun A board, tray, or table, divided into perforated compartments, for holding cups, bottles, or the like; a kind of cupboard, buffet, or sideboard.
V. Abacus ·noun A calculating table or frame; an instrument for performing arithmetical calculations by balls sliding on wires, or counters in grooves, the lowest line representing units, the second line, tens, ·etc. It is still employed in China.

Википедия

Abacus

The abacus (plural abaci or abacuses), also called a counting frame, is a calculating tool which has been used since ancient times. It was used in the ancient Near East, Europe, China, and Russia, millennia before the adoption of the Hindu-Arabic numeral system. The exact origin of the abacus has not yet emerged. It consists of rows of movable beads, or similar objects, strung on a wire. They represent digits. One of the two numbers is set up, and the beads are manipulated to perform an operation such as addition, or even a square or cubic root.

In their earliest designs, the rows of 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. Abacuses are still made, often as a bamboo frame with beads sliding on wires. In the ancient world, particularly before the introduction of positional notation, abacuses were a practical calculating tool. The abacus is still used to teach the fundamentals of mathematics to some children, for example, in Russia.

Designs such as the Japanese soroban have been used for practical calculations of up to multi-digit numbers. Any particular abacus design supports multiple methods to perform calculations, including addition, subtraction, multiplication, division, and square and cube roots. Some of these methods work with non-natural numbers (numbers such as 1.5 and 34).

Although calculators and computers are commonly used today instead of abacuses, abacuses remain in everyday use in some countries. Merchants, traders, and clerks in some parts of Eastern Europe, Russia, China, and Africa use abacuses. The abacus remains in common use as a scoring system in non-electronic table games. Others may use an abacus due to visual impairment that prevents the use of a calculator.

Примеры употребления для Abacus
1. Roy Hattersley‘s The Edwardians is published by Abacus
2. Another teaches the art of using the oriental abacus.
3. By Sylvia Cherry Permission to reprint/republish ._.__._____.____.___ ._.___________..___. ._._._._________..__ Mere electric lines become an abacus when birds alight.
4. And that would make you and me ... gosh, where did I put that abacus?
5. The method uses the Chinese abacus as a means to spur interest in math.