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  2. Addition - Wikipedia

    en.wikipedia.org/wiki/Addition

    The equivalence class of (a, b) contains either (a – b, 0) if a ≥ b, or (0, b – a) otherwise. If n is a natural number, one can denote +n the equivalence class of (n, 0), and by –n the equivalence class of (0, n). This allows identifying the natural number n with the equivalence class +n. Addition of ordered pairs is done component-wise:

  3. Third grade - Wikipedia

    en.wikipedia.org/wiki/Third_grade

    In science, third grade students are taught basic physics and chemistry. Weather and climate are also sometimes taught. The concept of atoms and molecules are common, the states of matter, and energy, along with basic chemical elements such as oxygen, hydrogen, gold, zinc, and iron. Nutrition is also sometimes taught in third grade along with ...

  4. Mathematics education in the United States - Wikipedia

    en.wikipedia.org/wiki/Mathematics_education_in...

    Mathematics education in the United States varies considerably from one state to the next, and even within a single state. However, with the adoption of the Common Core Standards in most states and the District of Columbia beginning in 2010, mathematics content across the country has moved into closer agreement for each grade level.

  5. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Some areas of mathematics, such as statistics and game theory, are developed in close correlation with their applications and are often grouped under applied mathematics. Other areas are developed independently from any application (and are therefore called pure mathematics) but often later find practical applications. [2] [3]

  6. The Letter People - Wikipedia

    en.wikipedia.org/wiki/The_Letter_People

    Alpha One, also known as Alpha One: Breaking the Code, was a first and second grade program introduced in 1968, and revised in 1974, [8] that was designed to teach children to read and write sentences containing words containing three syllables in length and to develop within the child a sense of his own success and fun in learning to read by using the Letter People characters. [9]

  7. List of PlayStation 3 games (A–C) - Wikipedia

    en.wikipedia.org/wiki/List_of_PlayStation_3_games...

    Abstraction Games Unreleased: June 28, 2016: June 28, 2016 D [citation needed] Aabs Animals: Aabs December 19, 2013: December 18, 2013: December 17, 2013 D [citation needed] Aaru's Awakening: Lumenox Games August 5, 2015: April 8, 2015: April 7, 2015 D [citation needed] Absolute Supercars: Eutechnyx: August 29, 2013: November 6, 2012: November ...

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