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  2. Ternary numeral system - Wikipedia

    en.wikipedia.org/wiki/Ternary_numeral_system

    As for rational numbers, ternary offers a convenient way to represent ⁠ 1 / 3 ⁠ as same as senary (as opposed to its cumbersome representation as an infinite string of recurring digits in decimal); but a major drawback is that, in turn, ternary does not offer a finite representation for ⁠ 1 / 2 ⁠ (nor for ⁠ 1 / 4 ⁠, ⁠ 1 / 8 ...

  3. Two's complement - Wikipedia

    en.wikipedia.org/wiki/Two's_complement

    Two's complement is the most common method of representing signed (positive, negative, and zero) integers on computers, [1] and more generally, fixed point binary values. Two's complement uses the binary digit with the greatest value as the sign to indicate whether the binary number is positive or negative; when the most significant bit is 1 the number is signed as negative and when the most ...

  4. Method of complements - Wikipedia

    en.wikipedia.org/wiki/Method_of_complements

    The nines' complement of a number given in decimal representation is formed by replacing each digit with nine minus that digit. To subtract a decimal number y (the subtrahend) from another number x (the minuend) two methods may be used: In the first method, the nines' complement of x is added to y. Then the nines' complement of the result ...

  5. Negative base - Wikipedia

    en.wikipedia.org/wiki/Negative_base

    Like other place-value systems, each position holds multiples of the appropriate power of the system's base; but that base is negative—that is to say, the base b is equal to −r for some natural number r (r ≥ 2). Negative-base systems can accommodate all the same numbers as standard place-value systems, but both positive and negative ...

  6. Decimal representation - Wikipedia

    en.wikipedia.org/wiki/Decimal_representation

    Some real numbers have decimal expansions that eventually get into loops, endlessly repeating a sequence of one or more digits: 1 ⁄ 3 = 0.33333... 1 ⁄ 7 = 0.142857142857... 1318 ⁄ 185 = 7.1243243243... Every time this happens the number is still a rational number (i.e. can alternatively be represented as a ratio of an integer and a ...

  7. Positional notation - Wikipedia

    en.wikipedia.org/wiki/Positional_notation

    Another common way of expressing the base is writing it as a decimal subscript after the number that is being represented (this notation is used in this article). 1111011 2 implies that the number 1111011 is a base-2 number, equal to 123 10 (a decimal notation representation), 173 8 and 7B 16 (hexadecimal).

  8. Fixed-point arithmetic - Wikipedia

    en.wikipedia.org/wiki/Fixed-point_arithmetic

    A fixed-point representation of a fractional number is essentially an integer that is to be implicitly multiplied by a fixed scaling factor. For example, the value 1.23 can be stored in a variable as the integer value 1230 with implicit scaling factor of 1/1000 (meaning that the last 3 decimal digits are implicitly assumed to be a decimal fraction), and the value 1 230 000 can be represented ...

  9. Repeating decimal - Wikipedia

    en.wikipedia.org/wiki/Repeating_decimal

    An initial transient of max(a, b) digits after the decimal point. Some or all of the digits in the transient can be zeros. A subsequent repetend which is the same as that for the fraction ⁠ 1 / p k q ℓ ⋯ ⁠. For example ⁠ 1 / 28 ⁠ = 0.03 571428: a = 2, b = 0, and the other factors p k q ℓ ⋯ = 7; there are 2 initial non-repeating ...

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