Abacus
Deutsch: Ein Abakus ist Hilfsmittel zum Ausführen verschiedener Rechenoperationen.
English: An Abacus is a calculation tool.
Français : Un abaque est un instrument facilitant les calculs.
Galego: Un ábaco é un instrumento de cálculo.
Norsk nynorsk: Ei Kuleramme er eit reknehjelpemiddel.
Русский: Абак, счёты.
Overview
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Chinese abacus -
Chinese abacus, big -
Chinese abacus, long -
Chinese abacus -
Danish abacus from an elementary school. -
German abacus -
Japanese soroban -
Polish abacus -
Reconstruction of a Roman abacus -
A Russian abacus
History
[Bearbeiten]Abacus in Ancient pictures
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145 AD -
177 AD -
204 AD -
218 AD -
236 AD
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Roman abacus from 1911 Encyclopædia Britannica -
Reconstruction of Roman Abacus, made by RGZ Museum Mainz in 1977
Abacus in Medieval pictures
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Monastic abacus, 10-12th century -
End of 13th century -
1340 -
14th century -
14 - 15th century -
1459
Abacus in 16th century pictures
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1504 -
1508 -
1514 -
1525 -
1532 -
1543 -
1544 -
1553 -
1573 -
1574 -
1592 -
Ming Dynasty (1368–1644) -
Rechentisch (Holzschnitt vermutlich aus Straßburg)
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Abacus in pictures in Modern times
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2nd quarter of 17th century -
2nd quarter of 17th century -
1641 -
1685 -
1884-85 -
1892 -
1899 -
Early 20th century
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1914 -
1930 -
1938 -
2007 -
2011 -
Huge Abacus at Guohua Abacus Museum
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Specific topics
[Bearbeiten]Abacus in art
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Rotschild canticles Septem artes liberales, 13th century
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1504
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1500-50 -
Hokusai, 1760 -
early 20th century
Types of abacus
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Abacus anagoria
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Binary abacus -
Long abacus
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Napier's abacus
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Positional decimal system on abacus -
School abacus -
Sharp abacus -
Soroban
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Table football abacus
The Small Abacus of Al-Khwarizmi
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Addition examples
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6 -
+ 4 -
= 10
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40 -
+12 -
=52
