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2. Fraction - Wikipedia

   en.wikipedia.org/wiki/Fraction

   (For example, two-fifths is the fraction ⁠ 2 / 5 ⁠ and two fifths is the same fraction understood as 2 instances of ⁠ 1 / 5 ⁠.) Fractions should always be hyphenated when used as adjectives. Alternatively, a fraction may be described by reading it out as the numerator over the denominator, with the denominator expressed as a cardinal ...

3. Equating coefficients - Wikipedia

   en.wikipedia.org/wiki/Equating_coefficients

   A similar problem, involving equating like terms rather than coefficients of like terms, arises if we wish to de-nest the nested radicals + to obtain an equivalent expression not involving a square root of an expression itself involving a square root, we can postulate the existence of rational parameters d, e such that

4. Subtraction - Wikipedia

   en.wikipedia.org/wiki/Subtraction

   Therefore, the difference of 5 and 2 is 3; that is, 5 − 2 = 3. While primarily associated with natural numbers in arithmetic, subtraction can also represent removing or decreasing physical and abstract quantities using different kinds of objects including negative numbers, fractions, irrational numbers, vectors, decimals, functions, and matrices.

5. Mathematics - Wikipedia

   en.wikipedia.org/wiki/Mathematics

   Since then, the interaction between mathematical innovations and scientific discoveries has led to a correlated increase in the development of both. [5] At the end of the 19th century, the foundational crisis of mathematics led to the systematization of the axiomatic method , [ 6 ] which heralded a dramatic increase in the number of ...

6. Living Books - Wikipedia

   en.wikipedia.org/wiki/Living_Books

   Living Books is a series of interactive read-along adventures aimed at children aged 3–9. Created by Mark Schlichting, the series was mostly developed by Living Books for CD-ROM and published by Broderbund for Mac OS and Microsoft Windows.