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  2. Multiplication table - Wikipedia

    en.wikipedia.org/wiki/Multiplication_table

    In mathematics, a multiplication table (sometimes, less formally, a times table) is a mathematical table used to define a multiplication operation for an algebraic system. The decimal multiplication table was traditionally taught as an essential part of elementary arithmetic around the world, as it lays the foundation for arithmetic operations ...

  3. Trachtenberg system - Wikipedia

    en.wikipedia.org/wiki/Trachtenberg_system

    Some of the algorithms Trachtenberg developed are ones for general multiplication, division and addition. Also, the Trachtenberg system includes some specialised methods for multiplying small numbers between 5 and 13. The section on addition demonstrates an effective method of checking calculations that can also be applied to multiplication.

  4. Multiplication - Wikipedia

    en.wikipedia.org/wiki/Multiplication

    The Educated Monkey—a tin toy dated 1918, used as a multiplication "calculator". For example: set the monkey's feet to 4 and 9, and get the product—36—in its hands. Many common methods for multiplying numbers using pencil and paper require a multiplication table of memorized or consulted products of small numbers (typically any two ...

  5. Elementary arithmetic - Wikipedia

    en.wikipedia.org/wiki/Elementary_arithmetic

    Multiplication is a mathematical operation of repeated addition. When two numbers are multiplied, the resulting value is a product. The numbers being multiplied are multiplicands, multipliers, or factors. Multiplication can be expressed as "five times three equals fifteen", "five times three is fifteen" or "fifteen is the product of five and ...

  6. Cayley table - Wikipedia

    en.wikipedia.org/wiki/Cayley_table

    The group {1, −1} above and the cyclic group of order 3 under ordinary multiplication are both examples of abelian groups, and inspection of the symmetry of their Cayley tables verifies this. In contrast, the smallest non-abelian group, the dihedral group of order 6, does not have a symmetric Cayley table.

  7. With a playoff blowout of Oregon, Ohio State proves it's ...

    www.aol.com/sports/playoff-blowout-oregon-ohio...

    In the three weeks between the Michigan loss and Ohio State’s College Football Playoff opener against Tennessee, Day says he met with his team to emphasize the opportunity the Buckeyes still had ...

  8. Friendly number - Wikipedia

    en.wikipedia.org/wiki/Friendly_number

    For example, the "primitive" friendly pair 6 and 28 gives rise to friendly pairs 6n and 28n for all n that are congruent to 1, 5, 11, 13, 17, 19, 23, 25, 29, 31, 37, or 41 modulo 42. [ 4 ] This shows that the natural density of the friendly numbers (if it exists) is positive.

  9. Massie comes out against Johnson retaining speaker's gavel ...

    www.aol.com/massie-comes-against-johnson...

    Rep. Thomas Massie, R-Ky., has declared that he will not vote for House Speaker Mike Johnson to retain the speakership next year. "He does not have my vote," Massie told CNN's Manu Raju. Asked ...

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