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2. Abacus - Wikipedia

   en.wikipedia.org/wiki/Abacus

   It adopts the form of the upper deck one bead and the bottom four beads. The top bead on the upper deck was equal to five and the bottom one is similar to the Chinese or Korean abacus, and the decimal number can be expressed, so the abacus is designed as a 1:4 device. The beads are always in the shape of a diamond.

3. Indian mathematics - Wikipedia

   en.wikipedia.org/wiki/Indian_mathematics

   The decimal number system in use today [3] was first recorded in Indian mathematics. [4] Indian mathematicians made early contributions to the study of the concept of zero as a number, [ 5 ] negative numbers , [ 6 ] arithmetic , and algebra . [ 7 ]

4. Arithmetic - Wikipedia

   en.wikipedia.org/wiki/Arithmetic

   If this number is truncated to 4 decimal places, the result is 3.141. Rounding is a similar process in which the last preserved digit is increased by one if the next digit is 5 or greater but remains the same if the next digit is less than 5, so that the rounded number is the best approximation of a given precision for the original number.

5. Rounding - Wikipedia

   en.wikipedia.org/wiki/Rounding

   With decimal arithmetic, final digits of 0 and 5 are avoided; if there is a choice between numbers with the least significant digit 0 or 1, 4 or 5, 5 or 6, 9 or 0, then the digit different from 0 or 5 shall be selected; otherwise, the choice is arbitrary. IBM defines that, in the latter case, a digit with the smaller magnitude shall be selected ...

6. History of mathematical notation - Wikipedia

   en.wikipedia.org/wiki/History_of_mathematical...

   (In decimal arithmetic, only reciprocals of multiples of 2 and 5 have finite decimal expansions.) Also, unlike the Egyptians, Greeks, and Romans, the Babylonians had a true place-value system, where digits written in the left column represented larger values, much as in the decimal system. They lacked, however, an equivalent of the decimal ...

7. Rolex retail prices jump in 2025 as used prices continue to ...

   www.aol.com/finance/rolex-retail-prices-jump...

   Prices paid for the holy trinity of Swiss watches — Rolex, Patek Philippe, and Audemars Piguet — fell 4.9%, 6.5%, and 7.4%, respectively. This follows a rough 2023 when Rolex prices fell 8.2% .

8. 22 Of The Funniest Tweets About Cats And Dogs This Week (Dec ...

   www.aol.com/22-funniest-tweets-cats-dogs...

   Woof — it’s been a looooooong week. If you feel like you’ve been working like a dog, let us offer you the internet equivalent of a big pile of catnip: hilarious tweets about pets.

9. 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.