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  2. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    This method requires the memorization of squares from 1 to a where a is the absolute difference between n and 100. For example, students who have memorized their squares from 1 to 24 can apply this method to any integer from 76 to 124. The square of n (i.e., 100 ± a) is 100(100 ± 2a) + a 2

  3. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    For instance, 7 divided by 2 is not a whole number but 3.5. [73] One way to ensure that the result is an integer is to round the result to a whole number. However, this method leads to inaccuracies as the original value is altered. [74] Another method is to perform the division only partially and retain the remainder. For example, 7 divided by ...

  4. ATM - Wikipedia

    en.wikipedia.org/wiki/ATM

    This is an accepted version of this page This is the latest accepted revision, reviewed on 19 December 2024. Electronic telecommunications device to perform financial transactions Several terms redirect here. For other uses, see Cash machine (disambiguation), Money machine (disambiguation), and ATM (disambiguation). An old Nixdorf ATM Smaller indoor ATMs dispense money inside convenience ...

  5. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    Pregnancy is divided into three trimesters, each lasting for approximately three months. [4] The exact length of each trimester can vary between sources. The first trimester begins with the start of gestational age as described above, that is, the beginning of week 1, or 0 weeks + 0 days of gestational age (GA).

  6. Windows 11 - Wikipedia

    en.wikipedia.org/wiki/Windows_11

    The Windows Insider program carries over from Windows 10, with pre-release builds divided into "Dev" (unstable builds used to test features for future feature updates), "Beta" (test builds for the next feature update; relatively stable in comparison to Dev channel), and "Release Preview" (pre-release builds for final testing of upcoming feature ...

  7. Windows 10 - Wikipedia

    en.wikipedia.org/wiki/Windows_10

    However, another method was found that allowed Windows 7 and 8/8.1 users to upgrade to Windows 10 using existing licenses, even though the free upgrade offers officially ended in 2017. [109] Some outlets have continued to promote it as a free method of upgrading from the now-unsupported Windows 7. [ 110 ]

  8. History of computing hardware - Wikipedia

    en.wikipedia.org/wiki/History_of_computing_hardware

    It could be used to add and subtract, and with a moveable carriage the operator could also multiply, and divide by a process of long multiplication and long division. [25] It utilised a stepped drum similar in conception to that invented by Leibniz. Mechanical calculators remained in use until the 1970s.