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  2. Multiplication table - Wikipedia

    en.wikipedia.org/wiki/Multiplication_table

    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 ...

  3. Trachtenberg system - Wikipedia

    en.wikipedia.org/wiki/Trachtenberg_system

    Trachtenberg system. The Trachtenberg system is a system of rapid mental calculation. The system consists of a number of readily memorized operations that allow one to perform arithmetic computations very quickly. It was developed by the Russian engineer Jakow Trachtenberg in order to keep his mind occupied while being in a Nazi concentration camp.

  4. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Mathematics is a field of study that discovers and organizes methods, theories and theorems that are developed and proved for the needs of empirical sciences and mathematics itself. There are many areas of mathematics, which include number theory (the study of numbers), algebra (the study of formulas and related structures), geometry (the study ...

  5. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    In accounting, a worksheet is, or was, a sheet of ruled paper with rows and columns on which an accountant could record information or perform calculations. These are often called columnar pads, and typically green-tinted. In computing, spreadsheet software presents, on a computer monitor, a user interface that resembles one or more paper ...

  6. Teamsters president said address to GOP convention was to ...

    www.aol.com/teamsters-president-said-address-gop...

    O’Brien was the first Teamsters president to ever speak at the GOP convention, during which he slammed “elites” whose only “loyalty is to the balance sheet.”

  7. Ukraine investigates new alleged murders of POWs by Russian ...

    www.aol.com/news/ukraine-investigates-alleged...

    Describing the latest in scores of such incidents Ukraine has reported, the Prosecutor General's office said on Telegram that it took place after Russian troops attacked a trench used by the ...

  8. 15 Things You Should Never Buy at a Garage Sale ... - AOL

    www.aol.com/lifestyle/15-things-never-buy-garage...

    Salt and Pepper Shakers. Liudmila Chernetska. Small knickknacks, like salt and pepper shakers, can be cute, but thrifting experts recommend against buying them at garage sales. "Vintage salt and ...

  9. Chinese multiplication table - Wikipedia

    en.wikipedia.org/wiki/Chinese_multiplication_table

    The Chinese multiplication table is the first requisite for using the Rod calculus for carrying out multiplication, division, the extraction of square roots, and the solving of equations based on place value decimal notation. It was known in China as early as the Spring and Autumn period, and survived through the age of the abacus; pupils in ...

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