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  2. Decimal - Wikipedia

    en.wikipedia.org/wiki/Decimal

    Decimal fractions (sometimes called decimal numbers, especially in contexts involving explicit fractions) are the rational numbers that may be expressed as a fraction whose denominator is a power of ten. [8] For example, the decimal expressions ,,,, represent the fractions ⁠ 4 / 5 ⁠, ⁠ 1489 / 100 ⁠, ⁠ 79 / 100000 ⁠, ⁠ + 809 / 500 ...

  3. Octal - Wikipedia

    en.wikipedia.org/wiki/Octal

    Example: Convert 764 8 to decimal: 764 8 = 7 × 8 2 + 6 × 8 1 + 4 × 8 0 = 448 + 48 + 4 = 500 10. For double-digit octal numbers this method amounts to multiplying the lead digit by 8 and adding the second digit to get the total. Example: 65 8 = 6 × 8 + 5 = 53 10

  4. Numeral prefix - Wikipedia

    en.wikipedia.org/wiki/Numeral_prefix

    binary, ternary, octal, decimal, hexadecimal (numbers expressed in base 2, base 3, base 8, base 10, base 16) septuagenarian, octogenarian (a person 70–79 years old, 80–89 years old) centipede , millipede (subgroups of arthropods with around 100 feet, or around 1 000 feet)

  5. Computer number format - Wikipedia

    en.wikipedia.org/wiki/Computer_number_format

    That is, the value of an octal "10" is the same as a decimal "8", an octal "20" is a decimal "16", and so on. In a hexadecimal system, there are 16 digits, 0 through 9 followed, by convention, with A through F. That is, a hexadecimal "10" is the same as a decimal "16" and a hexadecimal "20" is the same as a decimal "32".

  6. Numeral system - Wikipedia

    en.wikipedia.org/wiki/Numeral_system

    The positional decimal system is presently universally used in human writing. The base 1000 is also used (albeit not universally), by grouping the digits and considering a sequence of three decimal digits as a single digit. This is the meaning of the common notation 1,000,234,567 used for very large numbers.

  7. Positional notation - Wikipedia

    en.wikipedia.org/wiki/Positional_notation

    For example, the base-8 numeral 23 8 contains two digits, "2" and "3", and with a base number (subscripted) "8". When converted to base-10, the 23 8 is equivalent to 19 10, i.e. 23 8 = 19 10. In our notation here, the subscript "8" of the numeral 23 8 is part of the numeral, but this may not always be the case.

  8. Rational number - Wikipedia

    en.wikipedia.org/wiki/Rational_number

    The real numbers that are rational are those whose decimal expansion either terminates after a finite number of digits (example: 3/4 = 0.75), or eventually begins to repeat the same finite sequence of digits over and over (example: 9/44 = 0.20454545...

  9. Binary-coded decimal - Wikipedia

    en.wikipedia.org/wiki/Binary-coded_decimal

    3.1 EBCDIC zoned decimal conversion table. 3.2 Fixed-point zoned decimal. 4 Operations with BCD. ... (11,8,3) in the punched card, was encoded in memory as (B,8,2,1 ...