Perduapuluhan
Perduapuluhan atau vigesimal adalah sistem bilangan yang berasaskan 20 (sebagaimana sistem bilangan desimal berasaskan 10).
Terdapat berbagai kebudayaan yang menggunakan sistem perduapuluhan. Contoh-contohnya adalah peradaban Maya, Aztek, Inuit dan Yoruba.
Lihat juga
Bacaan lanjut
- Karl Menninger: Number words and number symbols: a cultural history of numbers; translated by Paul Broneer from the revised German edition. Cambridge, Mass.: M.I.T. Press, 1969 (also available in paperback: New York: Dover, 1992 ISBN 0-486-27096-3)
- Levi Leonard Conant: The Number Concept: Its Origin and Development; New York, New York: Macmillan & Co, 1931. Project Gutenberg EBook
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