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  2. Serial sevens - Wikipedia

    en.wikipedia.org/wiki/Serial_sevens

    Each subtraction is considered as a unit and calculations are made on the basis of the 14 possible correct subtractions, that is 100-93-86-79-72-65-58-51-44-37-30-23-16-9-2. [ 2 ] Similar tests include serial threes where the counting downwards is done by threes, reciting the months of the year in reverse order, or spelling 'world' backwards.

  3. Elementary arithmetic - Wikipedia

    en.wikipedia.org/wiki/Elementary_arithmetic

    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, writing a 7 above it, and writing a 1 above the 6.

  4. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    The order of operations, that is, the order in which the operations in an expression are usually performed, results from a convention adopted throughout mathematics, science, technology and many computer programming languages. It is summarized as: [2] [5] Parentheses; Exponentiation; Multiplication and division; Addition and subtraction

  5. Recamán's sequence - Wikipedia

    en.wikipedia.org/wiki/Recamán's_sequence

    In mathematics and computer science, Recamán's sequence [1] [2] is a well known sequence defined by a recurrence relation.Because its elements are related to the previous elements in a straightforward way, they are often defined using recursion.

  6. Subtraction - Wikipedia

    en.wikipedia.org/wiki/Subtraction

    It is also not associative, meaning that when one subtracts more than two numbers, the order in which subtraction is performed matters. Because 0 is the additive identity, subtraction of it does not change a number. Subtraction also obeys predictable rules concerning related operations, such as addition and multiplication.

  7. Paige DeSorbo Speaks Out amid Rumors She Cheated on Craig ...

    www.aol.com/paige-desorbo-speaks-amid-rumors...

    Paige DeSorbo is not interested in fans' theories on why she and Craig Conover broke up.. The Summer House star, 32, announced on the Monday, Dec. 30 episode of her podcast Giggly Squad that she ...

  8. very few teams have won it all

    images.huffingtonpost.com/2010-03-15-cheatsheet...

    This cheat sheet is the aftermath of hours upon hours of research on all of the teams in this year’s tournament field. I’ve listed each teams’ win and loss record, their against the

  9. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    Different types of numbers on a number line. Integers are black, rational numbers are blue, and irrational numbers are green. The main kinds of numbers employed in arithmetic are natural numbers, whole numbers, integers, rational numbers, and real numbers. [12] The natural numbers are whole numbers that start from 1 and go to infinity.

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