Wikimedia Commons

Abacus

calculating tool
(Redirected from そろばん)
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
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    Chinese abacus, big
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    Chinese abacus, long
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    Chinese abacus
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    Danish abacus from an elementary school.
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    German abacus
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    Japanese soroban
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    Polish abacus
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    Reconstruction of a Roman abacus
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    A Russian abacus

History

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Abacus in Ancient pictures

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    145 AD
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    177 AD
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    204 AD
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    218 AD
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    236 AD
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    Roman abacus from 1911 Encyclopædia Britannica
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    Reconstruction of Roman Abacus, made by RGZ Museum Mainz in 1977

Abacus in Medieval pictures

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    Monastic abacus, 10-12th century
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    End of 13th century
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    1340
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    14th century
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    14 - 15th century
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    1459

Abacus in 16th century pictures

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    1504
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    1508
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    1514
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    1525
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    1532
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    1543
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    1544
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    1553
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    1573
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    1574
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    1592
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    Ming Dynasty (1368–1644)
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    Rechentisch (Holzschnitt vermutlich aus Straßburg)

Abacus in pictures in Modern times

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    2nd quarter of 17th century
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    2nd quarter of 17th century
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    1641
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    1685
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    1884-85
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    1892
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    1899
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    Early 20th century
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    1914
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    1930
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    1938
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    2007
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    2011
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    Huge Abacus at Guohua Abacus Museum

Specific topics

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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
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    Hokusai, 1760
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    early 20th century

Types of abacus

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    Abacus anagoria
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    Binary abacus
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    Long abacus
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    Napier's abacus
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    Positional decimal system on abacus
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    School abacus
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    Sharp abacus
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    Soroban
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    Table football abacus

The Small Abacus of Al-Khwarizmi

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Addition examples

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See also

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