abacus$10$ - translation to greek
![Ten Commandments Monument]] at the [[Arkansas State Capitol]]](https://commons.wikimedia.org/wiki/Special:FilePath/21-16-020-commandments.jpg?width=200 "Ten Commandments Monument]] at the [[Arkansas State Capitol]]")
![Herodian]] period, between 30 and 1 BC](https://commons.wikimedia.org/wiki/Special:FilePath/4Q41 2.png?width=200 "Herodian]] period, between 30 and 1 BC")
![This 1768 [[parchment]] (612×502 mm) by [[Jekuthiel Sofer]] emulated the 1675 Ten Commandments at the [[Amsterdam Esnoga]] [[synagogue]]](https://commons.wikimedia.org/wiki/Special:FilePath/Decalogue parchment by Jekuthiel Sofer 1768.jpg?width=200 "This 1768 [[parchment]] (612×502 mm) by [[Jekuthiel Sofer]] emulated the 1675 Ten Commandments at the [[Amsterdam Esnoga]] [[synagogue]]")
![18th-century depiction of Moses receiving the tablets ([[Monheim Town Hall]])](https://commons.wikimedia.org/wiki/Special:FilePath/Monheim Town Hall 5.jpg?width=200 "18th-century depiction of Moses receiving the tablets ([[Monheim Town Hall]])")
![''[[Moses Breaking the Tablets of the Law]]'' (1659) by [[Rembrandt]]](https://commons.wikimedia.org/wiki/Special:FilePath/Rembrandt - Moses with the Ten Commandments - Google Art Project.jpg?width=200 "''[[Moses Breaking the Tablets of the Law]]'' (1659) by [[Rembrandt]]")
![Moses receives the Ten Commandments in this 1860 woodcut by [[Julius Schnorr von Carolsfeld]], a Lutheran.](https://commons.wikimedia.org/wiki/Special:FilePath/Schnorr von Carolsfeld Bibel in Bildern 1860 054.png?width=200 "Moses receives the Ten Commandments in this 1860 woodcut by [[Julius Schnorr von Carolsfeld]], a Lutheran.")
![The Sixth Commandment, as translated by the ''[[Book of Common Prayer]]'' (1549).<br />The image is from the altar screen of the [[Temple Church]] near the Law Courts in London.](https://commons.wikimedia.org/wiki/Special:FilePath/Sixth Commandment (Temple Church, London).jpg?width=200 "The Sixth Commandment, as translated by the ''[[Book of Common Prayer]]'' (1549).<br />The image is from the altar screen of the [[Temple Church]] near the Law Courts in London.")
![Austin]]](https://commons.wikimedia.org/wiki/Special:FilePath/TenCommandmentsAustinStateCapitol.jpg?width=200 "Austin]]")
Wikipedia
The abacus system of mental calculation is a system where users mentally visualize an abacus to carry out arithmetical calculations. No physical abacus is used; only the answers are written down. Calculations can be made at great speed in this way. For example, in the Flash Anzan event at the All Japan Soroban Championship, champion Takeo Sasano was able to add fifteen three-digit numbers in just 1.7 seconds.
This system is being propagated in China, Singapore, South Korea, Thailand, Malaysia, and Japan. Mental calculation is said to improve mental capability, increases speed of response, memory power, and concentration power.
Many veteran and prolific abacus users in China, Japan, South Korea, and others who use the abacus daily, naturally tend to not use the abacus any more, but perform calculations by visualizing the abacus. This was verified when the right brain of visualisers showed heightened EEG activity when calculating, compared with others using an actual abacus to perform calculations.
The abacus can be used routinely to perform addition, subtraction, multiplication, and division; it can also be used to extract square and cube roots.
