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  2. Subtraction - Wikipedia

    en.wikipedia.org/wiki/Subtraction

    The Austrian method does not reduce the 7 to 6. Rather it increases the subtrahend hundreds digit by one. A small mark is made near or below this digit (depending on the school). Then the subtraction proceeds by asking what number when increased by 1, and 5 is added to it, makes 7. The answer is 1, and is written down in the result's hundreds ...

  3. Lowest common denominator - Wikipedia

    en.wikipedia.org/wiki/Lowest_common_denominator

    In mathematics, the lowest common denominator or least common denominator (abbreviated LCD) is the lowest common multiple of the denominators of a set of fractions. It simplifies adding, subtracting, and comparing fractions.

  4. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    A cake with one quarter (one fourth) removed. The remaining three fourths are shown by dotted lines and labeled by the fraction1 / 4 ⁠ A fraction (from Latin: fractus, "broken") represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain ...

  5. Mathematics education - Wikipedia

    en.wikipedia.org/wiki/Mathematics_education

    During the primary school years, children learn about whole numbers and arithmetic, including addition, subtraction, multiplication, and division. [27] Comparisons and measurement are taught, in both numeric and pictorial form, as well as fractions and proportionality , patterns, and various topics related to geometry.

  6. Difference of two squares - Wikipedia

    en.wikipedia.org/wiki/Difference_of_two_squares

    The difference of two squares can also be illustrated geometrically as the difference of two square areas in a plane.In the diagram, the shaded part represents the difference between the areas of the two squares, i.e. .

  7. Frederick W. Smith - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/frederick-w-smith

    From January 2008 to December 2012, if you bought shares in companies when Frederick W. Smith joined the board, and sold them when he left, you would have a 3.6 percent return on your investment, compared to a -2.8 percent return from the S&P 500.

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