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  2. Subtraction - Wikipedia

    en.wikipedia.org/wiki/Subtraction

    Formally, the number being subtracted is known as the subtrahend, [4] [5] while the number it is subtracted from is the minuend. [4] [5] The result is the difference. [4] [5] [2] [6] That is, =. All of this terminology derives from Latin.

  3. Difference of two squares - Wikipedia

    en.wikipedia.org/wiki/Difference_of_two_squares

    2.4 Mental arithmetic. ... In mathematics, the difference of two squares is a squared (multiplied by itself) number subtracted from another squared number.

  4. Subtract a square - Wikipedia

    en.wikipedia.org/wiki/Subtract_a_square

    A normal play game starting with 13 coins is a win for the first player provided they start with a subtraction of 1: player 1: 13 - 1*1 = 12 Player 2 now has three choices: subtract 1, 4 or 9.

  5. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    For example, subtraction is the inverse of addition since a number returns to its original value if a second number is first added and subsequently subtracted, as in + =. Defined more formally, the operation " ⋆ {\displaystyle \star } " is an inverse of the operation " ∘ {\displaystyle \circ } " if it fulfills the following condition: t ⋆ ...

  6. 1 + 2 + 3 + 4 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    The first four partial sums of the series 1 + 2 + 3 + 4 + ⋯.The parabola is their smoothed asymptote; its y-intercept is −1/12. [1]The infinite series whose terms ...

  7. Four fours - Wikipedia

    en.wikipedia.org/wiki/Four_fours

    For example, when d=4, the hash table for two occurrences of d would contain the key-value pair 8 and 4+4, and the one for three occurrences, the key-value pair 2 and (4+4)/4 (strings shown in bold). The task is then reduced to recursively computing these hash tables for increasing n , starting from n=1 and continuing up to e.g. n=4.

  8. CNN Poll: Public remains negative on Trump ahead of address ...

    www.aol.com/news/cnn-poll-public-remains...

    The American public’s view of Donald Trump’s presidency and the direction he’s leading the country is remains more negative than positive just ahead of his first formal address to Congress ...

  9. Power of two - Wikipedia

    en.wikipedia.org/wiki/Power_of_two

    The only known powers of 2 with all digits even are 2 1 = 2, 2 2 = 4, 2 3 = 8, 2 6 = 64 and 2 11 = 2048. [12] The first 3 powers of 2 with all but last digit odd is 2 4 = 16, 2 5 = 32 and 2 9 = 512. The next such power of 2 of form 2 n should have n of at least 6 digits.