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  2. Fourth grade - Wikipedia

    en.wikipedia.org/wiki/Fourth_grade

    Fourth grade (also 4th Grade or Grade 4) is the fourth year of formal or compulsory education. ... long division, fractions, decimals, the metric system, and geometry

  3. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    Whether common fractions or decimal fractions are used is often a matter of taste and context. Common fractions are used most often when the denominator is relatively small. By mental calculation, it is easier to multiply 16 by 3/16 than to do the same calculation using the fraction's decimal equivalent (0.1875).

  4. Unit fraction - Wikipedia

    en.wikipedia.org/wiki/Unit_fraction

    Slices of approximately 1/8 of a pizza. A unit fraction is a positive fraction with one as its numerator, 1/ n.It is the multiplicative inverse (reciprocal) of the denominator of the fraction, which must be a positive natural number.

  5. Principles and Standards for School Mathematics - Wikipedia

    en.wikipedia.org/wiki/Principles_and_Standards...

    The Principles and Standards for School Mathematics was developed by the NCTM. The NCTM's stated intent was to improve mathematics education. The contents were based on surveys of existing curriculum materials, curricula and policies from many countries, educational research publications, and government agencies such as the U.S. National Science Foundation. [3]

  6. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    Continued fractions with more than 20 known terms have been truncated, with an ellipsis to show that they continue. Rational numbers have two continued fractions; the version in this list is the shorter one. Decimal representations are rounded or padded to 10 places if the values are known.

  7. Irreducible fraction - Wikipedia

    en.wikipedia.org/wiki/Irreducible_fraction

    For example, โ  1 / 4 โ , โ  5 / 6 โ , and โ  −101 / 100 โ  are all irreducible fractions. On the other hand, โ  2 / 4 โ  is reducible since it is equal in value to โ  1 / 2 โ , and the numerator of โ  1 / 2 โ  is less than the numerator of โ  2 / 4 โ . A fraction that is reducible can be reduced by dividing both the numerator ...

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