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  2. Addition - Wikipedia

    en.wikipedia.org/wiki/Addition

    Doubles: Adding a number to itself is related to counting by two and to multiplication. Doubles facts form a backbone for many related facts, and students find them relatively easy to grasp. [36] Near-doubles: Sums such as 6 + 7 = 13 can be quickly derived from the doubles fact 6 + 6 = 12 by adding one more, or from 7 + 7 = 14 but subtracting ...

  3. Elementary arithmetic - Wikipedia

    en.wikipedia.org/wiki/Elementary_arithmetic

    Example of addition with carry. The black numbers are the addends, the green number is the carry, and the blue number is the sum. In the rightmost digit, the addition of 9 and 7 is 16, carrying 1 into the next pair of the digit to the left, making its addition 1 + 5 + 2 = 8. Therefore, 59 + 27 = 86.

  4. Number bond - Wikipedia

    en.wikipedia.org/wiki/Number_bond

    In mathematics education at primary school level, a number bond (sometimes alternatively called an addition fact) is a simple addition sum which has become so familiar that a child can recognise it and complete it almost instantly, with recall as automatic as that of an entry from a multiplication table in multiplication.

  5. Commutative property - Wikipedia

    en.wikipedia.org/wiki/Commutative_property

    Addition and multiplication are commutative in most number systems, and, in particular, between natural numbers, integers, rational numbers, real numbers and complex numbers. This is also true in every field. Addition is commutative in every vector space and in every algebra. Union and intersection are commutative operations on sets.

  6. Plus and minus signs - Wikipedia

    en.wikipedia.org/wiki/Plus_and_minus_signs

    In the algebraic notation used to record games of chess, the plus sign + is used to denote a move that puts the opponent into check, while a double plus ++ is sometimes used to denote double check. Combinations of the plus and minus signs are used to evaluate a move (+/−, +/=, =/+, −/+).

  7. McDonald's is bringing back the Double Big Mac. Experts ... - AOL

    www.aol.com/lifestyle/mcdonalds-bringing-back...

    In addition to the classic Big Mac sauce, slice of American cheese, lettuce, pickles and chopped onion, this burger contains a whopping four beef burger patties, — twice the double patty found ...

  8. Recall of facts - Wikipedia

    en.wikipedia.org/wiki/Recall_of_facts

    Helping children learn the basic facts is an important goal in the Everyday Mathematics Curriculum. Most children should have developed an automatic recall of the basic addition and subtraction facts by the end of the second grade. They should also know most of their 1, 2, 5, and 10 multiplication facts by this time.

  9. Fact check: Flipped photo falsely claims Biden has a body ...

    www.aol.com/news/fact-check-flipped-photo...

    Fact check: Biden didn't mangle proverb about teaching someone to fish Our rating: False A post using an altered image of President Joe Biden to claim that he has a body double is FALSE, based on ...

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