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  2. Rounding - Wikipedia

    en.wikipedia.org/wiki/Rounding

    For example, rounding x = 2.1784 dollars to whole cents (i.e., to a multiple of 0.01) entails computing 2.1784 / 0.01 = 217.84, then rounding that to 218, and finally computing 218 × 0.01 = 2.18. When rounding to a predetermined number of significant digits , the increment m depends on the magnitude of the number to be rounded (or of the ...

  3. Fixed-point arithmetic - Wikipedia

    en.wikipedia.org/wiki/Fixed-point_arithmetic

    Consider the task of computing the product of 1.2 and 5.6 with binary fixed point using 16 fraction bits. To represent the two numbers, one multiplies them by 2 16, obtaining 78 643.2 and 367 001.6; and round these values the nearest integers, obtaining 78 643 and 367 002. These numbers will fit comfortably into a 32-bit word with two's ...

  4. Floating-point arithmetic - Wikipedia

    en.wikipedia.org/wiki/Floating-point_arithmetic

    For example, if there is no representable number lying between the representable numbers 1.45a70c22 hex and 1.45a70c24 hex, the ULP is 2×16 −8, or 2 −31. For numbers with a base-2 exponent part of 0, i.e. numbers with an absolute value higher than or equal to 1 but lower than 2, an ULP is exactly 2 −23 or about 10 −7 in single ...

  5. Talk:Rounding - Wikipedia

    en.wikipedia.org/wiki/Talk:Rounding

    I didn't find any description for rounding to the nearest 1/2 integer value, i.e. to values of 0, 0.5, 1, 1.5, etc.--Fkbreitl 12:00, 8 May 2021 (UTC) Not needed (like rounding to some number of fractional digits): this is like doing an exact multiplication by 2, rounding to an integer, and dividing by 2.

  6. IEEE 754 - Wikipedia

    en.wikipedia.org/wiki/IEEE_754

    Round to nearest, ties to even – rounds to the nearest value; if the number falls midway, it is rounded to the nearest value with an even least significant digit. Round to nearest, ties away from zero (or ties to away ) – rounds to the nearest value; if the number falls midway, it is rounded to the nearest value above (for positive numbers ...

  7. Round-off error - Wikipedia

    en.wikipedia.org/wiki/Round-off_error

    There are two common rounding rules, round-by-chop and round-to-nearest. The IEEE standard uses round-to-nearest. Round-by-chop: The base-expansion of is truncated after the ()-th digit. This rounding rule is biased because it always moves the result toward zero. Round-to-nearest: () is set to the nearest floating-point number to . When there ...

  8. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    For example, to say that 14 × 15 was 201 would be unreasonable. Since 15 is a multiple of 5, the product should be as well. Likewise, 14 is a multiple of 2, so the product should be even. Furthermore, any number which is a multiple of both 5 and 2 is necessarily a multiple of 10, and in the decimal system would end with a 0. The correct answer ...

  9. Single-precision floating-point format - Wikipedia

    en.wikipedia.org/wiki/Single-precision_floating...

    Integers between 2 24 =16777216 and 2 25 =33554432 round to a multiple of 2 (even number) Integers between 2 25 and 2 26 round to a multiple of 4... Integers between 2 n and 2 n+1 round to a multiple of 2 n-23... Integers between 2 127 and 2 128 round to a multiple of 2 104; Integers greater than or equal to 2 128 are rounded to "infinity".

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