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  2. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    For example, the number 45 in scientific notation is 4.5 × 10 1, but one will call it a × 10 b. Next, find the logarithm of a, which is between 1 and 10. Start by finding the logarithm of 4, which is .60, and then the logarithm of 5, which is .70 because 4.5 is between these two.

  3. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    For example, if a ruler's smallest mark is 0.1 cm, and 4.5 cm is read, then it is 4.5 (±0.1 cm) or 4.4 cm to 4.6 cm as to the smallest mark interval. However, in practice a measurement can usually be estimated by eye to closer than the interval between the ruler's smallest mark, e.g. in the above case it might be estimated as between 4.51 cm ...

  4. Sinclair Scientific - Wikipedia

    en.wikipedia.org/wiki/Sinclair_Scientific

    50 by 111 by 19 millimetres (1.97 in × 4.37 in × 0.75 in) (Scientific) 73 by 155 by 34 millimetres (2.9 in × 6.1 in × 1.3 in) (Scientific Programmable) The Sinclair Scientific was a 12-function, pocket-sized scientific calculator introduced in 1974, dramatically undercutting in price other calculators available at the time.

  5. Addition - Wikipedia

    en.wikipedia.org/wiki/Addition

    A number-line visualization of the algebraic addition 2 + 4 = 6. A "jump" that has a distance of 2 followed by another that is long as 4, is the same as a translation by 6. A number-line visualization of the unary addition 2 + 4 = 6. A translation by 4 is equivalent to four translations by 1.

  6. Methods of computing square roots - Wikipedia

    en.wikipedia.org/wiki/Methods_of_computing...

    A method analogous to piece-wise linear approximation but using only arithmetic instead of algebraic equations, uses the multiplication tables in reverse: the square root of a number between 1 and 100 is between 1 and 10, so if we know 25 is a perfect square (5 × 5), and 36 is a perfect square (6 × 6), then the square root of a number greater than or equal to 25 but less than 36, begins with ...

  7. Parallel (operator) - Wikipedia

    en.wikipedia.org/wiki/Parallel_(operator)

    Graphical interpretation of the parallel operator with =.. The parallel operator ‖ (pronounced "parallel", [1] following the parallel lines notation from geometry; [2] [3] also known as reduced sum, parallel sum or parallel addition) is a binary operation which is used as a shorthand in electrical engineering, [4] [5] [6] [nb 1] but is also used in kinetics, fluid mechanics and financial ...

  8. alt.tv.simpsons - Wikipedia

    en.wikipedia.org/wiki/Alt.tv.simpsons

    alt.tv.simpsons (called "a.t.s." by regular readers) is a usenet newsgroup dedicated to discussing the American television program The Simpsons.Created in 1990, the newsgroup became a popular community in the early 1990s.