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  2. Elementary arithmetic - Wikipedia

    en.wikipedia.org/wiki/Elementary_arithmetic

    American schools teach a method of subtraction using borrowing. [12] A subtraction problem such as is solved by borrowing a 10 from the tens place to add to the ones place in order to facilitate the subtraction. Subtracting 9 from 6 involves borrowing a 10 from the tens place, making the problem into +. This is indicated by crossing out the 8 ...

  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. Subtraction - Wikipedia

    en.wikipedia.org/wiki/Subtraction

    Subtraction of numbers 0–10. Line labels = minuend. X axis = subtrahend. Y axis = difference. Subtraction is usually written using the minus sign "−" between the terms; that is, in infix notation. The result is expressed with an equals sign. For example, = (pronounced as "two minus one equals one")

  5. Grid method multiplication - Wikipedia

    en.wikipedia.org/wiki/Grid_method_multiplication

    Instead of operating on multiples of 10, they are operated on 32-bit integers. Instead of higher bits being multiplied by ten, they are multiplied by 0x100000000 . This is usually done by either shifting to the left by 32 or putting the value into a specific register that represents the higher 32 bits.

  6. Proportional reasoning - Wikipedia

    en.wikipedia.org/wiki/Proportional_reasoning

    Less frequently the reason for two units is: "Before there is a total of 10 units because 4 + 6 = 10. The total number of units must stay the same so the answer is 2 because 2 + 8 = 10." So again there are individuals who are not at the formal operational level apply an additive strategy rather than a multiplicative strategy to solve an inverse ...

  7. Word problem (mathematics education) - Wikipedia

    en.wikipedia.org/wiki/Word_problem_(mathematics...

    Word problem from the Līlāvatī (12th century), with its English translation and solution. In science education, a word problem is a mathematical exercise (such as in a textbook, worksheet, or exam) where significant background information on the problem is presented in ordinary language rather than in mathematical notation.

  8. Dying To Be Free - The Huffington Post

    projects.huffingtonpost.com/dying-to-be-free...

    “Buprenorphine became the first-line treatment,” Auriacombe said, adding that the medication has helped to change public and law enforcement perceptions about addicts. An article in the May issue of the New England Journal of Medicine called for wider U.S. use of medication-assisted therapies for addicts, commonly referred to as MATs.

  9. Subtraction game - Wikipedia

    en.wikipedia.org/wiki/Subtraction_game

    Subtraction games are generally impartial games, meaning that the set of moves available in a given position does not depend on the player whose turn it is to move.For such a game, the states can be divided up into -positions (positions in which the previous player, who just moved, is winning) and -positions (positions in which the next player to move is winning), and an optimal game playing ...

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