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- Q2997913 subject Q6423154.
- Q2997913 subject Q6812555.
- Q2997913 subject Q7006957.
- Q2997913 subject Q7008737.
- Q2997913 abstract "The Suan Pan (simplified Chinese: 算盘; traditional Chinese: 算盤; pinyin: suànpán, suanpan or souanpan) is an abacus of Chinese origin first described in a 190 CE book of the Eastern Han Dynasty, namely Supplementary Notes on the Art of Figures written by Xu Yue. However, the exact design of this suanpan is not known.Usually, a suanpan is about 20 cm (8 in) tall and it comes in various widths depending on the application. It usually has more than seven rods. There are two beads on each rod in the upper deck and five beads on each rod in the bottom deck. This configuration is used for both decimal and hexadecimal computation. The beads are usually rounded and made of a hardwood. The beads are counted by moving them up or down towards the beam. The suanpan can be reset to the starting position instantly by a quick jerk around the horizontal axis to spin all the beads away from the horizontal beam at the center.Suanpans can be used for functions other than counting. Unlike the simple counting board used in elementary schools, very efficient suanpan techniques have been developed to do multiplication, division, addition, subtraction, square root and cube root operations at high speed.The modern suanpan has 4+1 beads, colored beads to indicate position and a clear-all button. When the clear-all button is pressed, two mechanical levers push the top row beads to the top position and the bottom row beads to the bottom position, thus clearing all numbers to zero. This replaces clearing the beads by hand, or quickly rotating the suanpan around its horizontal center line to clear the beads by centrifugal force.".
- Q2997913 thumbnail Abacus_6.png?width=300.
- Q2997913 wikiPageExternalLink suanpan.
- Q2997913 wikiPageExternalLink suanpan.php.
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- Q2997913 wikiPageWikiLink Q6423154.
- Q2997913 wikiPageWikiLink Q6812555.
- Q2997913 wikiPageWikiLink Q7006957.
- Q2997913 wikiPageWikiLink Q7008737.
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- Q2997913 comment "The Suan Pan (simplified Chinese: 算盘; traditional Chinese: 算盤; pinyin: suànpán, suanpan or souanpan) is an abacus of Chinese origin first described in a 190 CE book of the Eastern Han Dynasty, namely Supplementary Notes on the Art of Figures written by Xu Yue. However, the exact design of this suanpan is not known.Usually, a suanpan is about 20 cm (8 in) tall and it comes in various widths depending on the application. It usually has more than seven rods.".
- Q2997913 label "Suanpan".
- Q2997913 depiction Abacus_6.png.