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2. Least common multiple - Wikipedia

   en.wikipedia.org/wiki/Least_common_multiple

   A least common multiple of a and b is a common multiple that is minimal, in the sense that for any other common multiple n of a and b, m divides n. In general, two elements in a commutative ring can have no least common multiple or more than one. However, any two least common multiples of the same pair of elements are associates. [10]

3. Lowest common denominator - Wikipedia

   en.wikipedia.org/wiki/Lowest_common_denominator

   For example, the numerators of fractions with common denominators can simply be added, such that + = and that <, since each fraction has the common denominator 12. Without computing a common denominator, it is not obvious as to what 5 12 + 11 18 {\displaystyle {\frac {5}{12}}+{\frac {11}{18}}} equals, or whether 5 12 {\displaystyle {\frac {5 ...

4. The ClueFinders 4th Grade Adventures: Puzzle of the Pyramid

   en.wikipedia.org/wiki/The_ClueFinders_4th_Grade...

   All Game Guide gave the game four out five stars, generally complimenting graphics, gameplay and controls, and called it "a delightful mix of adventure and learning". [2] Game Vortex rated it 80/100, [ 3 ] 7Wolf Magazine rated it 70/100, while macHOME gave it 3 out of 5 stars.

5. Cross-multiplication - Wikipedia

   en.wikipedia.org/wiki/Cross-multiplication

   The rule of three [1] was a historical shorthand version for a particular form of cross-multiplication that could be taught to students by rote. It was considered the height of Colonial maths education [2] and still figures in the French national curriculum for secondary education, [3] and in the primary education curriculum of Spain. [4]

6. Table of prime factors - Wikipedia

   en.wikipedia.org/wiki/Table_of_prime_factors

   m and n are coprime (also called relatively prime) if gcd(m, n) = 1 (meaning they have no common prime factor). lcm(m, n) (least common multiple of m and n) is the product of all prime factors of m or n (with the largest multiplicity for m or n). gcd(m, n) × lcm(m, n) = m × n. Finding the prime factors is often harder than computing gcd and ...

7. Traditional mathematics - Wikipedia

   en.wikipedia.org/wiki/Traditional_mathematics

   Criticism of traditional mathematics instruction originates with advocates of alternative methods of instruction, such as Reform mathematics.These critics cite studies, such as The Harmful Effects of Algorithms in Grades 1–4, which found specific instances where traditional math instruction was less effective than alternative methods.