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  2. Mathematical table - Wikipedia

    en.wikipedia.org/wiki/Mathematical_table

    The first tables of trigonometric functions known to be made were by Hipparchus (c.190 – c.120 BCE) and Menelaus (c.70–140 CE), but both have been lost. Along with the surviving table of Ptolemy (c. 90 – c.168 CE), they were all tables of chords and not of half-chords, that is, the sine function. [1]

  3. Subtraction - Wikipedia

    en.wikipedia.org/wiki/Subtraction

    Then the subtraction proceeds by asking what number when increased by 1, and 5 is added to it, makes 7. The answer is 1, and is written down in the result's hundreds place. There is an additional subtlety in that the student always employs a mental subtraction table in the American method.

  4. Gaussian logarithm - Wikipedia

    en.wikipedia.org/wiki/Gaussian_logarithm

    (NB. Contains a table of Gaussian logarithms lg(1+10 −x).) Kalivoda, Jan (2003-07-30). "Bruce Stark - Tables for Clearing the Lunar Distance and Finding G.M.T. by Sextant Observation (1995, 1997)" (Review). Prague, Czech Republic. Archived from the original on 2004-01-12 …] Bruce Stark […] uses the Gaussian logarithms that make possible ...

  5. Elementary arithmetic - Wikipedia

    en.wikipedia.org/wiki/Elementary_arithmetic

    The symbols for elementary-level math operations. From top-left going clockwise: addition, division, multiplication, and subtraction. Elementary arithmetic is a branch of mathematics involving addition, subtraction, multiplication, and division.

  6. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    A worksheet, in the word's original meaning, is a sheet of paper on which one performs work.They come in many forms, most commonly associated with children's school work assignments, tax forms, and accounting or other business environments.

  7. Compu-Math - Wikipedia

    en.wikipedia.org/wiki/Compu-Math

    Compu-Math: Fractions was the first program created in the Compu-Math series, being introduced in Edu-Ware's March 1, 1980 catalog.Fractions six learning modules include tutorials on definitions, common and lowest denominators, fraction addition, fraction subtraction, fraction multiplication, and fraction division.