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  2. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    [20] [21] The acronym PEMDAS, which stands for Parentheses, Exponents, Multiplication/Division, Addition/Subtraction, [22] is common in the United States [23] and France. [24] Sometimes the letters are expanded into words of a mnemonic sentence such as "Please Excuse My Dear Aunt Sally". [ 25 ]

  3. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    This is the minimum number of characters needed to encode a 32 bit number into 5 printable characters in a process similar to MIME-64 encoding, since 85 5 is only slightly bigger than 2 32. Such method is 6.7% more efficient than MIME-64 which encodes a 24 bit number into 4 printable characters.

  4. Numeral system - Wikipedia

    en.wikipedia.org/wiki/Numeral_system

    In general, if b is the base, one writes a number in the numeral system of base b by expressing it in the form a n b n + a n − 1 b n − 1 + a n − 2 b n − 2 + ... + a 0 b 0 and writing the enumerated digits a n a n − 1 a n − 2... a 0 in descending order. The digits are natural numbers between 0 and b − 1, inclusive.

  5. Talk:Order of operations - Wikipedia

    en.wikipedia.org/wiki/Talk:Order_of_operations

    Mr. Swordfish and several others share a consensus that there is a difference between a mathematical operation and a symbol of grouping. Why, then, does he keep adding Parentheses to the list of mathematical operations? What does he think that adds to the article? Rick Norwood 21:55, 22 August 2023 (UTC) This is extremely simple.

  6. List of mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_mnemonics

    To remember the number of humps on types of camels: [8]: 67 [11] D in Dromedary has one hump; B in Bactrian has two; To recognize poison ivy. Leaves of three, leave it be. COWS stand for Cold Opposite Warm Same, which are the relation between the components of the Caloric reflex test [12] To memorise DNA/nucleotide base pairs

  7. History of ancient numeral systems - Wikipedia

    en.wikipedia.org/wiki/History_of_ancient_numeral...

    Within the counting system used with most discrete objects (including animals like sheep), there was a token for one item (units), a different token for ten items (tens), a different token for six tens (sixties), etc. Tokens of different sizes and shapes were used to record higher groups of ten or six in a sexagesimal number system.

  8. Mnemonic peg system - Wikipedia

    en.wikipedia.org/wiki/Mnemonic_peg_system

    There is also the major system, which connects sounds to numbers. [ 3 ] [ 4 ] The major system is more complicated to learn than simple rhymes or alphabetic pegs, because it associates numbers 0-9 with a specific letter or sound, then larger numbers can combine to create words out of the sounds. [ 3 ]

  9. Approximate number system - Wikipedia

    en.wikipedia.org/wiki/Approximate_number_system

    The approximate number system (ANS) is a cognitive system that supports the estimation of the magnitude of a group without relying on language or symbols. The ANS is credited with the non-symbolic representation of all numbers greater than four, with lesser values being carried out by the parallel individuation system, or object tracking system. [1]