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  2. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    0.00034 has 2 significant figures (3 and 4) if the resolution is 0.00001. Zeros to the right of the last non-zero digit (trailing zeros) in a number with the decimal point are significant if they are within the measurement or reporting resolution. 1.200 has four significant figures (1, 2, 0, and 0) if they are allowed by the measurement resolution.

  3. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    Fractions such as 1 ⁄ 3 are displayed as decimal approximations, for example rounded to 0.33333333. Also, some fractions (such as 1 ⁄ 7, which is 0.14285714285714; to 14 significant figures) can be difficult to recognize in decimal form; as a result, many scientific calculators are able to work in vulgar fractions or mixed numbers.

  4. False precision - Wikipedia

    en.wikipedia.org/wiki/False_precision

    False precision (also called overprecision, fake precision, misplaced precision, and spurious precision) occurs when numerical data are presented in a manner that implies better precision than is justified; since precision is a limit to accuracy (in the ISO definition of accuracy), this often leads to overconfidence in the accuracy, named precision bias.

  5. Rounding - Wikipedia

    en.wikipedia.org/wiki/Rounding

    2.1784: 2.18 2 decimal places Approximating a decimal integer by an integer with more trailing zeros 23217: 23200: 3 significant figures Approximating a large decimal integer using scientific notation: 300999999: 3.01 × 10 8: 3 significant figures Approximating a value by a multiple of a specified amount 48.2 45 Multiple of 15

  6. IBM hexadecimal floating-point - Wikipedia

    en.wikipedia.org/wiki/IBM_hexadecimal_floating-point

    Six hexadecimal digits of precision is roughly equivalent to six decimal digits (i.e. (6 − 1) log 10 (16) ≈ 6.02). A conversion of single precision hexadecimal float to decimal string would require at least 9 significant digits (i.e. 6 log 10 (16) + 1 ≈ 8.22) in order to convert back to the same hexadecimal float value.

  7. Stepped reckoner - Wikipedia

    en.wikipedia.org/wiki/Stepped_reckoner

    In English: "a number consisting of a whole series of figures, as long as it may be (in proportion to the size of the machine)". His first preliminary brass machine was built between 1674 and 1685. His so-called older machine was built between 1686 and 1694. The 'younger machine', the surviving machine, was built from 1690 to 1720. [2]

  8. Juan Caramuel y Lobkowitz - Wikipedia

    en.wikipedia.org/wiki/Juan_Caramuel_y_Lobkowitz

    In 1638 he defended his academic theses with great success, and was granted the degree of Doctor of Theology by the University of Leuven on 2 September 1638. [11] Having learned more of the doctrines of Cornelius Jansen, who had died earlier in that year, Caramuel embarked on a preaching crusade through Belgium and Germany, especially Mainz. An ...

  9. 1789 in science - Wikipedia

    en.wikipedia.org/wiki/1789_in_science

    The year 1789 in science and technology involved some significant ... The Slovene mathematician Jurij Vega presents his approximation of π to 140 decimal places of ...