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Early Counting Methods

Early Counting Methods. Early Counting Tokens Tallies. Plain Counting Tokens. Counting Tokens. Ishango Bone. Tally of the Exchequer. Inca Quipu. Base Number Systems. Number Bases Quinary Decimal Duodecimal Vigesimal Sexagesimal. Egyptian Numerals. Egyptian Example.

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Early Counting Methods

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  1. Early Counting Methods • Early Counting • Tokens • Tallies

  2. Plain Counting Tokens

  3. Counting Tokens

  4. IshangoBone

  5. Tally of the Exchequer

  6. Inca Quipu

  7. Base Number Systems • Number Bases • Quinary • Decimal • Duodecimal • Vigesimal • Sexagesimal

  8. Egyptian Numerals

  9. Egyptian Example

  10. Babylonian Numerals

  11. Cuneiform Tablet

  12. Mayan Numerals

  13. Greek Numerals

  14. Roman Numerals • I=1 • V=5 • X=10 • L=50 • C=100 • D=500 • M=1000

  15. Roman Numerals: Subtraction • IV=4 • IX=9 • XL=40 • XC=90 • CD=400 • CM=900 Only symbols that are powers of 10 can be subtracted, and only from the next two largest values.

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