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  2. Subtraction - Wikipedia

    en.wikipedia.org/wiki/Subtraction

    [2] In a sense, subtraction is the inverse of addition. That is, c = a − b if and only if c + b = a. In words: the difference of two numbers is the number that gives the first one when added to the second one. Subtraction follows several important patterns. It is anticommutative, meaning that changing the order changes the sign of the answer.

  3. Investigations in Numbers, Data, and Space - Wikipedia

    en.wikipedia.org/wiki/Investigations_in_Numbers...

    Investigations was developed between 1990 and 1998. It was just one of a number of reform mathematics curricula initially funded by a National Science Foundation grant. The goals of the project raised opposition to the curriculum from critics (both parents and mathematics teachers) who objected to the emphasis on conceptual learning instead of instruction in more recognized specific methods ...

  4. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    The numerals used in the Bakhshali manuscript, dated between the 2nd century BC and the 2nd century AD The Hindu–Arabic numeral system and the rules for the use of its operations, in use throughout the world today, evolved over the course of the first millennium AD in India and were transmitted to the Western world via Islamic mathematics ...

  5. Our Crockpot Mac & Cheese Is Impossible To Mess Up - AOL

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    1 1/2 tsp. dry mustard powder. 3/4 tsp. garlic powder. 1/8 tsp. ground nutmeg. Freshly ground black pepper. 3 c. shredded sharp cheddar. 1 c. shredded Gruyère. 1 c. shredded mozzarella. 1/3 c.

  6. Plus and minus signs - Wikipedia

    en.wikipedia.org/wiki/Plus_and_minus_signs

    The subtraction operator: a binary operator to indicate the operation of subtraction, as in 5 − 3 = 2. Subtraction is the inverse of addition. [1] The function whose value for any real or complex argument is the additive inverse of that argument. For example, if x = 3, then −x = −3, but if x = −3, then −x = +3.

  7. What NFL games are on Thanksgiving? Teams, matchups for the ...

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    Dallas' Week 13 clash with the Giants will be its second straight divisional matchup, following a Week 12 game against the Commanders in Washington. The Thanksgiving game will be New York's second ...

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