Dragon & Phoenix Chinese Abacus Set---Red

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The suanpan of the Chinese dates from the Han Dynasty (202 BCE - 184 CE).However, it rose to prominence during the Yuan Dynasty (1271 CE - 1368 CE).The Chinese abacus around 20 cm (8 inches) 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 each in the bottom 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 abacus can be reset to the starting position instantly by a quick jerk along the horizontal axis to spin all the beads away from the horizontal beam at the center.Chinese abaci 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.Dimensions: 6"1/2Lx4"1/4Wx1"3/8HPreparation Time: 2-3 working days
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