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2. Grid method multiplication - Wikipedia

   en.wikipedia.org/wiki/Grid_method_multiplication

   While not normally taught as a standard method for multiplying fractions, the grid method can readily be applied to simple cases where it is easier to find a product by breaking it down. For example, the calculation 2 ⁠ 1 / 2 ⁠ × 1 ⁠ 1 / 2 ⁠ can be set out using the grid method

3. Calculator - Wikipedia

   en.wikipedia.org/wiki/Calculator

   Scientific calculator displays of fractions and decimal equivalents Input Electronic calculators contain a keyboard with buttons for digits and arithmetical operations; some even contain "00" and "000" buttons to make larger or smaller numbers easier to enter.

4. Trachtenberg system - Wikipedia

   en.wikipedia.org/wiki/Trachtenberg_system

   The system consists of a number of readily memorized operations that allow one to perform arithmetic computations very quickly. It was developed by the Russian engineer Jakow Trachtenberg in order to keep his mind occupied while being in a Nazi concentration camp. The rest of this article presents some methods devised by Trachtenberg.

5. Megamaths - Wikipedia

   en.wikipedia.org/wiki/Megamaths

   Megamaths is a BBC educational television series for primary schools that was originally aired on BBC Two from 16 September 1996 to 4 February 2002. For its first three series, it was set in a castle on top of Table Mountain, populated by the four card suits (Kings, Queens and Jacks/Jackies, and a Joker who looked after children that visited the castle and took part in mathematical challenges).

6. Multiplication - Wikipedia

   en.wikipedia.org/wiki/Multiplication

   Generalization to fractions is by multiplying the numerators and denominators, respectively: = (). This gives the area of a rectangle A B {\displaystyle {\frac {A}{B}}} high and C D {\displaystyle {\frac {C}{D}}} wide, and is the same as the number of things in an array when the rational numbers happen to be whole numbers.

7. Keyboard shortcuts in AOL Mail

   help.aol.com/articles/keyboard-shortcuts-in-aol-mail

   Keyboard shortcuts make it easier and quicker to perform some simple tasks in your AOL Mail. Access all shortcuts by pressing shift+? on your keyboard. All shortcuts are formatted for Windows computers, but most will work on a Mac by substituting Cmd for Ctrl or Option for Alt. General keyboard shortcuts

8. Mental calculation - Wikipedia

   en.wikipedia.org/wiki/Mental_calculation

   Note that if n 2 is the closest perfect square to the desired square x and d = x - n 2 is their difference, it is more convenient to express this approximation in the form of mixed fraction as . Thus, in the previous example, the square root of 15 is 4 − 1 8 . {\displaystyle 4{\tfrac {-1}{8}}.}

9. ‘Sleep Revolution Cheat Sheet’ by Huffington Post

   testkitchen.huffingtonpost.com/sleep-revolution...

   Credits . Creative Directors. Carina Kolodny & Marc Janks . Art Direction. Adam Glucksman . Web Design. Isabella Carapella & Ji Sub Jeong . Motion Graphics & Graphic Design