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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. Talk:Order of operations - Wikipedia

    en.wikipedia.org/wiki/Talk:Order_of_operations

    So many people have been taught that false "rule" in grade school that many people insist that what they learned in grade school is true. But all mathematicians know that addition is commutative and associative and multiplication is commutative and associative, and mathematicians generally perform operations in whatever order is most convenient.

  4. List of mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_mnemonics

    Difference between Advice & Advise, Practice & Practise, Licence & License etc. Advice, Practice, Licence etc. (those with c) are nouns and Advise, Practise, License etc. are verbs. One way of remembering this is that the word ' n oun' comes before the word ' v erb' in the dictionary; likewise ' c' comes before ' s' , so the n ouns are 'practi ...

  5. Mnemonic - Wikipedia

    en.wikipedia.org/wiki/Mnemonic

    Knuckle mnemonic for the number of days in each month of the Gregorian calendar.Each knuckle represents a 31-day month. A mnemonic device (/ n ə ˈ m ɒ n ɪ k / nə-MON-ik) [1] or memory device is any learning technique that aids information retention or retrieval in the human memory, often by associating the information with something that is easier to remember.

  6. Academic grading in the United States - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_the...

    The top grade, A, is given here for performance that exceeds the mean by more than 1.5 standard deviations, a B for performance between 0.5 and 1.5 standard deviations above the mean, and so on. [17] Regardless of the absolute performance of the students, the best score in the group receives a top grade and the worst score receives a failing grade.

  7. Video compression picture types - Wikipedia

    en.wikipedia.org/wiki/Video_compression_picture...

    A B‑frame (Bidirectional predicted picture) saves even more space by using differences between the current frame and both the preceding and following frames to specify its content. P and B frames are also called inter frames. The order in which the I, P and B frames are arranged is called the group of pictures.

  8. Gonggi - Wikipedia

    en.wikipedia.org/wiki/Gonggi

    The only difference between snail and gonggi is how to grab the stone. In snail, the edge of the player's hand has to be stuck on the ground at every step. Instead of throwing a stone up in the air, the player sweeps his hand across the ground in a large circle and grabs a certain number of stones.

  9. Grade separation - Wikipedia

    en.wikipedia.org/wiki/Grade_separation

    Grade-separated pedestrian and cycling routes often require modest space since they do not typically intersect with the facility (such as a highway) that they cross. However, grade-separated pedestrian crossings with steps introduce accessibility problems. Some crossings have lifts, but these can be time-consuming to use.