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  2. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    (2 here is assumed not an exact number.) For the first example, the first term has its last significant figure in the thousandths place and the second term has its last significant figure in the ones place. The leftmost or largest digit position among the last significant figures of these terms is the ones place, so the calculated result should ...

  3. Rounding - Wikipedia

    en.wikipedia.org/wiki/Rounding

    Recalculating the index for the same period using rounding to the nearest thousandth rather than truncation corrected the index value from 524.811 up to 1098.892. [ 3 ] For the examples below, sgn( x ) refers to the sign function applied to the original number, x .

  4. Decimal separator - Wikipedia

    en.wikipedia.org/wiki/Decimal_separator

    The use of thin spaces as separators, [30]: 133 not dots or commas (for example: 20 000 and 1 000 000 for "twenty thousand" and "one million"), has been official policy of the International Bureau of Weights and Measures since 1948 (and reaffirmed in 2003) stating

  5. Orders of magnitude (numbers) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(numbers)

    1/52! chance of a specific shuffle Mathematics: The chances of shuffling a standard 52-card deck in any specific order is around 1.24 × 10 −68 (or exactly 1 ⁄ 52!) [4] Computing: The number 1.4 × 10 −45 is approximately equal to the smallest positive non-zero value that can be represented by a single-precision IEEE floating-point value.

  6. Googol - Wikipedia

    en.wikipedia.org/wiki/Googol

    The decay time for a supermassive black hole of roughly 1 galaxy-mass (10 11 solar masses) due to Hawking radiation is on the order of 10 100 years. [7] Therefore, the heat death of an expanding universe is lower-bounded to occur at least one googol years in the future.

  7. Scientific notation - Wikipedia

    en.wikipedia.org/wiki/Scientific_notation

    Using scientific notation, this value can be uniformly expressed to any desired precision, from the nearest tenth of a millimeter 2.54 × 10 1 mm to the nearest nanometer 2.540 0000 × 10 1 mm, or beyond. Hyperinflation means that too much money is put into circulation, perhaps by printing banknotes, chasing too few goods. It is sometimes ...

  8. Millionth - Wikipedia

    en.wikipedia.org/wiki/Millionth

    One millionth is equal to 0.000 001, or 1 x 10 −6 in scientific notation.It is the reciprocal of a million, and can be also written as 1 ⁄ 1,000,000. [1] Units using this fraction can be indicated using the prefix "micro-" from Greek, meaning "small". [2]

  9. Per mille - Wikipedia

    en.wikipedia.org/wiki/Per_mille

    The phrase per mille (from Latin per mÄ«lle ' in each thousand ') [1] indicates parts per thousand. [2] The associated symbol is ‰, similar to a per cent sign % but with an extra zero in the divisor. Major dictionaries do not agree on the spelling, [1] [2] [3] giving other options of per mil, [2] per mill, [1] [3] permil, [1] [4] permill, [1 ...