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  2. Plus and minus signs - Wikipedia

    en.wikipedia.org/wiki/Plus_and_minus_signs

    The minus sign (−) has three main uses in mathematics: [16] The subtraction operator: a binary operator to indicate the operation of subtraction, as in 5 − 3 = 2. Subtraction is the inverse of addition. [1] The function whose value for any real or complex argument is the additive inverse of that argument.

  3. World Book Encyclopedia - Wikipedia

    en.wikipedia.org/wiki/World_Book_Encyclopedia

    A faithful effort has been made in the World Book to avoid this common defect." The encyclopedia's name would later be shortened to its current name World Book. [1] In 1919, World Book became the property of W.F. Quarrie & Company. The new owners created an editorial board to help make sure the entries were aligned with what students studied ...

  4. Two's complement - Wikipedia

    en.wikipedia.org/wiki/Two's_complement

    Two's complement is the most common method of representing signed (positive, negative, and zero) integers on computers, [1] and more generally, fixed point binary values. Two's complement uses the binary digit with the greatest value as the sign to indicate whether the binary number is positive or negative; when the most significant bit is 1 the number is signed as negative and when the most ...

  5. Evidence-based practice - Wikipedia

    en.wikipedia.org/wiki/Evidence-based_practice

    Evidence-based practice is the idea that occupational practices ought to be based on scientific evidence.The movement towards evidence-based practices attempts to encourage and, in some instances, require professionals and other decision-makers to pay more attention to evidence to inform their decision-making.

  6. Mathematics education - Wikipedia

    en.wikipedia.org/wiki/Mathematics_education

    Elementary mathematics in most countries is taught similarly, though there are differences. Most countries tend to cover fewer topics in greater depth than in the United States. [26] During the primary school years, children learn about whole numbers and arithmetic, including addition, subtraction, multiplication, and division. [27]

  7. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    Unit fractions can also be expressed using negative exponents, as in 2 −1, which represents 1/2, and 22, which represents 1/(2 2) or 1/4. A dyadic fraction is a common fraction in which the denominator is a power of two , e.g. ⁠ 1 / 8 ⁠ = ⁠ 1 / 2 3 ⁠ .

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