Abacus

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Deutsch: Ein Abakus ist Hilfsmittel zum Ausführen verschiedener Rechenoperationen.
English: An Abacus is a calculation tool.
Galego: Un ábaco é un instrumento de cálculo.
Norsk nynorsk: Ei Kuleramme er eit reknehjelpemiddel.
Русский: Абак, счёты.

Contents

Overview [edit]

  • Chinese abacus

  • Chinese abacus, big

  • Chinese abacus, long

  • Danish abacus from an elementary school.

  • German abacus

  • Japanese soroban

  • Polish abacus

  • Reconstruction of a Roman abacus

  • A Russian abacus

History [edit]

Abacus in Ancient pictures [edit]

  • 145 AD

  • 177 AD

  • 204 AD

  • 218 AD

  • 236 AD

  • Roman abacus from 1911 Encyclopedia Britannica

  • Reconstruction of Roman Abacus, made by RGZ Museum Mainz in 1977

Abacus in Medieval pictures [edit]

  • Monastic abacus, 10-12th century

  • End of 13th century

  • 1340

  • 14th century

  • 14 - 15th century

  • 1459

Abacus in 16th century pictures [edit]

  • 1504

  • 1508

  • 1514

  • 1525

  • 1532

  • 1543

  • 1544

  • 1553

  • 1573

  • 1574

  • 1592

  • Ming Dynasty (1368–1644)

Abacus in pictures in Modern times [edit]

  • 2nd quarter of 17th century

  • 2nd quarter of 17th century

  • 1641

  • 1685

  • 1884-85

  • 1892

  • 1899

  • Early 20th century

  • 1914

  • 1930

  • 1938

  • 2007

  • 2008

  • 2011

Specific topics [edit]

Abacus in art [edit]

  • Rotschild canticles Septem artes liberales, 13th century

  • 1504

  • 1500-50

  • Hokusai, 1760

Types of abacus [edit]

  • Abacus anagoria

  • Binary abacus

  • Long abacus

  • Napier's abacus

  • Positional decimal system on abacus

  • School abacus

  • Sharp abacus

  • Soroban

  • Table football abacus

The Small Abacus of Al-Khwarizmi [edit]

  • AbacusBeansFiveTen.PNG
  • AbacusBaseFiveTen.PNG
  • Abacus Base Five Ten.PNG
  • Al Khwarizmi Numerals.PNG
  • Al Khwarizmi numerais.PNG
  • Abacus theory of the arabic numbers and the algarismus.png
  • Abacus theory of arabic numbers and algarismus.gif

Addition examples [edit]

  • 6

  • + 4

  • = 10

  • 40

  • +12

  • =52

See also [edit]

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