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  2. Decimal separator - Wikipedia

    en.wikipedia.org/wiki/Decimal_separator

    [6] [2] [7] In some specialized contexts, the word decimal is instead used for this purpose (such as in International Civil Aviation Organization-regulated air traffic control communications). In mathematics, the decimal separator is a type of radix point, a term that also applies to number systems with bases other than ten.

  3. Portal:Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Portal:Arithmetic

    Place value of number in decimal system The decimal numeral system (also called the base-ten positional numeral system and denary / ˈ d iː n ər i / or decanary) is the standard system for denoting integer and non-integer numbers. It is the extension to non-integer numbers (decimal fractions) of the Hindu–Arabic numeral system.

  4. Positional notation - Wikipedia

    en.wikipedia.org/wiki/Positional_notation

    Positional notation, also known as place-value notation, positional numeral system, or simply place value, usually denotes the extension to any base of the Hindu–Arabic numeral system (or decimal system).

  5. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    Arithmetic is the fundamental branch of mathematics that studies numbers and their operations. In particular, it deals with numerical calculations using the arithmetic operations of addition, subtraction, multiplication, and division. [1]

  6. Chronology of computation of π - Wikipedia

    en.wikipedia.org/wiki/Chronology_of_computation...

    Calculated 140 decimal places, but not all were correct 126 1794: Adrien-Marie Legendre: Showed that π 2 (and hence π) is irrational, and mentioned the possibility that π might be transcendental. 1824: William Rutherford [2] Calculated 208 decimal places, but not all were correct 152 1844: Zacharias Dase and Strassnitzky [2]

  7. Decimal - Wikipedia

    en.wikipedia.org/wiki/Decimal

    Place value of number in decimal system. The decimal numeral system (also called the base-ten positional numeral system and denary / ˈ d iː n ər i / [1] or decanary) is the standard system for denoting integer and non-integer numbers. It is the extension to non-integer numbers (decimal fractions) of the Hindu–Arabic numeral system.