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The digits in the base and exponent (10 3 or 10 −2) are considered exact numbers so for these digits, significant figures are irrelevant. Explicitly state the number of significant figures (the abbreviation s.f. is sometimes used): For example "20 000 to 2 s.f." or "20 000 (2 sf)".
Excel maintains 15 figures in its numbers, but they are not always accurate; mathematically, the bottom line should be the same as the top line, in 'fp-math' the step '1 + 1/9000' leads to a rounding up as the first bit of the 14 bit tail '10111000110010' of the mantissa falling off the table when adding 1 is a '1', this up-rounding is not undone when subtracting the 1 again, since there is no ...
This table illustrates an example of decimal value of 149 and the location of LSb. In this particular example, the position of unit value (decimal 1 or 0) is located in bit position 0 (n = 0). MSb stands for most significant bit, while LSb stands for least significant bit.
This template has two different functions dependent on input. If only one parameter is given the template counts the number of significant figures of the given number within the ranges 10 12 to 10 −12 and −10 −12 to −10 12.
Significant figures is a rough approximation to uncertainty, and commonly rounded to integers. One decimal digit is worth 3.32 bits. Note that the actual precision can vary, such that 100 has two significant digits and 999 has 2.9996 digits. Sometimes there is need to be more accurate than the rounded value, other times not.
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