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  2. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    If the result of step 4 does not equal the result of step 5, then the original answer is wrong. If the two results match, then the original answer may be right, though it is not guaranteed to be. Example Assume the calculation 6,338 × 79, manually done, yielded a result of 500,702: Sum the digits of 6,338: (6 + 3 = 9, so count that as 0) + 3 ...

  3. Configuration management - Wikipedia

    en.wikipedia.org/wiki/Configuration_management

    MIL-STD-3046 Configuration Management, [28] 6 March 2013 and canceled on June 1, 2015; Defense Acquisition Guidebook, [29] elements of CM at 4.3.7 SE Processes, attributes of CM at 5.1.7 Lifecycle support; Systems Engineering Fundamentals, Chapter 10 Configuration Management [30]

  4. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    For instance, the rational numbers , , and are written as 0.1, 3.71, and 0.0044 in the decimal fraction notation. [100] Modified versions of integer calculation methods like addition with carry and long multiplication can be applied to calculations with decimal fractions. [ 101 ]

  5. Simplification - Wikipedia

    en.wikipedia.org/wiki/Simplification

    Simplification is the process of replacing a mathematical expression by an equivalent one that is simpler (usually shorter), according to a well-founded ordering. Examples include:

  6. 0.999... - Wikipedia

    en.wikipedia.org/wiki/0.999...

    For example, in base 2 (the binary numeral system) 0.111... equals 1, and in base 3 (the ternary numeral system) 0.222... equals 1. In general, any terminating base expression has a counterpart with repeated trailing digits equal to − 1. Textbooks of real analysis are likely to skip the example of 0.999... and present one or both of these ...

  7. Highly composite number - Wikipedia

    en.wikipedia.org/wiki/Highly_composite_number

    For example, 6 is highly composite because d(6)=4 and d(n)=1,2,2,3,2 for n=1,2,3,4,5 respectively. A related concept is that of a largely composite number , a positive integer that has at least as many divisors as all smaller positive integers.

  8. Multiplication table - Wikipedia

    en.wikipedia.org/wiki/Multiplication_table

    Multiplication table from 1 to 10 drawn to scale with the upper-right half labeled with prime factorisations. In mathematics, a multiplication table (sometimes, less formally, a times table) is a mathematical table used to define a multiplication operation for an algebraic system.

  9. Split-complex number - Wikipedia

    en.wikipedia.org/wiki/Split-complex_number

    ISBN 0-12-329650-1. Contains a description of normed algebras in indefinite signature, including the Lorentz numbers. Hazewinkle, M. (1994) "Double and dual numbers", Encyclopaedia of Mathematics, Soviet/AMS/Kluwer, Dordrect. Kevin McCrimmon (2004) A Taste of Jordan Algebras, pp 66, 157, Universitext, Springer ISBN 0-387-95447-3 MR 2014924