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  2. 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.

  3. Word problem (mathematics education) - Wikipedia

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

    For instance, if the one solving the math word problem has a limited understanding of the language (English, Spanish, etc.) they are more likely to not understand what the problem is even asking. In Example 1 (above), if one does not comprehend the definition of the word "spent," they will misunderstand the entire purpose of the word problem.

  4. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    For example, a person's height measured with a tape measure might only be precisely known to the nearest centimeter, so should be presented as 1.62 meters rather than 1.6217 meters. If converted to imperial units, this quantity should be rounded to 64 inches or 63.8 inches rather than 63.7795 inches, to clearly convey the precision of the ...

  5. List of set identities and relations - Wikipedia

    en.wikipedia.org/wiki/List_of_set_identities_and...

    Set subtraction complexity: To manage the many identities involving set subtraction, this section is divided based on where the set subtraction operation and parentheses are located on the left hand side of the identity.

  6. Subtraction - Wikipedia

    en.wikipedia.org/wiki/Subtraction

    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.

  7. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    For example, multiplication is granted a higher precedence than addition, and it has been this way since the introduction of modern algebraic notation. [2] [3] Thus, in the expression 1 + 2 × 3, the multiplication is performed before addition, and the expression has the value 1 + (2 × 3) = 7, and not (1 + 2) × 3 = 9.

  8. Silver–Meal heuristic - Wikipedia

    en.wikipedia.org/wiki/Silver–Meal_heuristic

    h: holding cost per unit per period. C(T) : the average holding and setup cost per period if the current order spans the next T periods. Let (r 1, r 2, r 3, .....,r n) be the requirements over the n-period horizon. To satisfy the demand for period 1 = The average cost = only the setup cost and there is no inventory holding cost

  9. Break (work) - Wikipedia

    en.wikipedia.org/wiki/Break_(work)

    The California Supreme court ruled that employers satisfy their California Labor Code section 512 obligation to "provide" meal periods to nonexempt employees by (1) relieving employees of all duty; (2) relinquishing control over their activities and permitting them a reasonable opportunity to take an uninterrupted 30-minute break; and (3) not ...

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