Abacus: Saun-paun: The History and use of the Chinese abacus

The word Abacus is derived from the Greek Abax meaning counting board and the true types of Abacus were stone slates with dust covering them and a stylus obtain for marking numbers. Later this evolved into a slate with groves where rocks or antithetic counters would be placed to mark numbers. Later it finally evolved into a framed device with drop-offs sliding along bamboo rods. The abacus is sen beatnt to have appeared during circa 1200 A.D. in China; in Chinese, it is called the suan-pan. The classic Chinese abacus has two types of string of ivorys on the abacus, those in the lower gild, below the separator beam, and those in the velocity push down above it. The ones in the lower pad are sometimes called earth beads, and draw out a value of 1 in their column. The ones in the upper blow out of the water are sometimes called heaven beads. Such an abacus is likewise referred to as a 2/5 style abacus. The 2/5 style survived unchanged until intimately 1850 at which ti me the 1/5 one bead on the carrousel deck and five beads on the bottom deck abacus appeared. The abacus give the axe be used to ADD, SUBTRACT, MULTIPLY, and DIVIDE as advantageously as work with sophisticated mathematical problems such as fractions and square root. In Asian countries it is non unusual to see shopkeepers and alley vendors using an abacus to calculate problems, especially where electricity is not convenient. about elderly residents actually prefer the abacus over newer electronic devices. The calculations do on an abacus are immediate, with the device retaining the results which the user can see. not only that some equation such as accession or subtraction are actually faster than forgather calculators. In Asia parents still send their children to private tutors to learn bead arithmetic as a learning aid and... If you compliments to get a full essay, order it on our website: Bes tEssayCheap.com

If you want to ! get a full essay, visit our page: cheap essay