Section 4.2: Hindu-Arabic Numeration System

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4.2 Outline

  1. Hindu-Arabic numerals
    1. decimal numeration system
    2. algorists vs. abacists
  2. Decimal system – grouping by tens
  3. Expanded notation
    1. meaning of a number
    2. decimal point

4.2 Essential Ideas

The Hindu-Arabic or decimal numeration system is the one we use everyday. Its properties include:

  1. It uses ten symbols, called digits.
  2. Larger numbers are expressed in terms of powers of 10.
  3. It is positional.

The essential idea of this section is expanded notation.