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2. Positional notation - Wikipedia

   en.wikipedia.org/wiki/Positional_notation

   Decimal fractions were first developed and used by the Chinese in the form of rod calculus in the 1st century BC, and then spread to the rest world. [6] [7] J. Lennart Berggren notes that positional decimal fractions were first used in the Arab by mathematician Abu'l-Hasan al-Uqlidisi as early as the 10th century. [8]

3. Rule of twelfths - Wikipedia

   en.wikipedia.org/wiki/Rule_of_twelfths

   This gives the increase in the water level by 3:00 p.m. as 6 metres. This represents only the increase - the total depth of the water (relative to chart datum) will include the 2 m depth at low tide: 6 m + 2 m = 8 metres. The calculation can be simplified by adding twelfths together and reducing the fraction beforehand:

4. Decimal - Wikipedia

   en.wikipedia.org/wiki/Decimal

   Place value of number in decimal system. The decimal numeral system (also called the base-ten positional numeral system and denary / ˈ d iː n ər i / [1] or decanary) is the standard system for denoting integer and non-integer numbers. It is the extension to non-integer numbers (decimal fractions) of the Hindu–Arabic numeral system.

5. Chronology of computation of π - Wikipedia

   en.wikipedia.org/wiki/Chronology_of_computation...

   The last 100 decimal digits of the latest world record computation are: [1] 7034341087 5351110672 0525610978 1945263024 9604509887 5683914937 4658179610 2004394122 9823988073 3622511852 Graph showing how the record precision of numerical approximations to pi measured in decimal places (depicted on a logarithmic scale), evolved in human history.

6. 9 Mistakes You Should Never Make With A Slow Cooker - AOL

   www.aol.com/9-mistakes-never-slow-cooker...

   Maybe we all watched a little too much This Is Us and are still mourning the loss of Jack Pearson, or maybe a kitchen mishap as a child has left us wary of slow cookers. Whatever the case may be ...

7. Chess piece relative value - Wikipedia

   en.wikipedia.org/wiki/Chess_piece_relative_value

   In chess, a relative value (or point value) is a standard value conventionally assigned to each piece. Piece valuations have no role in the rules of chess but are useful as an aid to assessing a position. The best known system assigns 1 point to a pawn, 3 points to a knight or bishop, 5 points to a rook and 9 points to a queen. However ...