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  2. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    The rule to calculate significant figures for multiplication and division are not the same as the rule for addition and subtraction. For multiplication and division, only the total number of significant figures in each of the factors in the calculation matters; the digit position of the last significant figure in each factor is irrelevant.

  3. Guard digit - Wikipedia

    en.wikipedia.org/wiki/Guard_digit

    The addition of the two numbers is: 0.0256*10^2 2.3400*10^2 + ____________ 2.3656*10^2 After padding the second number (i.e., 2.34 × 10 2 {\displaystyle 2.34\times 10^{2}} ) with two 0 {\displaystyle 0} s, the bit after 4 {\displaystyle 4} is the guard digit, and the bit after is the round digit.

  4. Plus and minus signs - Wikipedia

    en.wikipedia.org/wiki/Plus_and_minus_signs

    Though the signs now seem as familiar as the alphabet or the Hindu–Arabic numerals, they are not of great antiquity.The Egyptian hieroglyphic sign for addition, for example, resembled a pair of legs walking in the direction in which the text was written (Egyptian could be written either from right to left or left to right), with the reverse sign indicating subtraction: [2]

  5. Talk:Significant figures - Wikipedia

    en.wikipedia.org/wiki/Talk:Significant_figures

    I think the arithmetic section could use two quick examples, one for each rule. For example, 1300 x 0.5 = 700. There are two significant figures (1 and 3) in the number 1300, and there is one significant figure (5) in the number 0.5. Therefore, the product will have only one significant figure.

  6. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    The main arithmetic operations are addition, subtraction, multiplication, and division. Arithmetic is an elementary branch of mathematics that studies numerical operations like addition, subtraction, multiplication, and division. In a wider sense, it also includes exponentiation, extraction of roots, and taking logarithms.

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    mail.aol.com

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  8. Digit sum - Wikipedia

    en.wikipedia.org/wiki/Digit_sum

    For divisibility by 9, this test is called the rule of nines and is the basis of the casting out nines technique for checking calculations. Digit sums are also a common ingredient in checksum algorithms to check the arithmetic operations of early computers. [ 3 ]

  9. Fix problems reading or receiving AOL Mail

    help.aol.com/articles/fix-problems-reading-or...

    When emails go missing in AOL Mail, it's often due to a few simple things; either the message is in the wrong folder, your third-party mail client's settings, or your account was deactivated due to inactivity.