![]() There may be small dots on the front of the abacus, called House points. House Points (also called Unit Points or Separation Dots) Beadsīeads represent numerical values depending on which rod and deck they are housed in. This progresses for as many rods as the abacus contains. The rod to the left of the “ones” column represents “tens” and to the left of that is the “hundreds” rod. The rod to the farthest right of the abacus represents the ones column. Two beads in the upper deck and five beads in the lower deck. The rods contain beads that are slid towards the beam or away from it. Rods run perpendicular to and through the beam. The upper deck is used for keeping track of very large groups of sums and the lower deck is used for individual and smaller sums. There are two decks: an upper deck and lower deck. It runs across the entire frame and divides the upper deck from the lower deck. ![]() (Also called the Crosspiece) The beam runs parallel to the top and bottom of the frame. It is the outside of the abacus and the part that holds the entire apparatus together and in place. The following descriptions are of the Chinese abacus. ![]() In order to use an abacus, we must first understand how it is constructed and how its parts work to perform counting and mathematical operations. Those that were found in Rome resembled the Chinese abacus suggesting that the use of the abacus spread from Greece and Rome to China, and then to Japan and Russia. but because it was made of wood, only a small number of these have ever been found. The more familiar form of the modern abacus was definitely used in Ancient Rome from 753 B.C.E. Abacus is a Latin word which was taken from the Greek word abax, which means “board covered with sand.” This was likely a reference to a type of counting board that was the predecessor of the modern abacus and was simply a portable sand table where marks were made in the sand to record totals. It is interesting to note that it was in use centuries before any modern written numeral system existed. However, many scholars have compelling arguments for the Phoenicians, Babylonians and even Chinese. The earliest form of an abacus was used over five thousand years ago and was possibly invented in Greece. History of AbacusesĬredit to who invented the abacus is under debate. I don’t know about you, but I find those plural versions extremely fun to just blurt of nowhere. If you pair an abacus with the song Smarter 123s, your kids will be a counting, calculating, math wiz in no time.įun fact, “abaci” and “abacuses” are both acceptable plural versions of abacus. Who wouldn’t want this for their kids and themselves? You get slide & clank beads loudly back and forth while calculating complex algorithms of data. The abacus helps with patterns, color recognition, and aids to develop a visual and tactile relationship with numbers. It’s a math developing tool for kids that’s disguised as a toy. An abacus is basically a wooden calculator, but it’s so much more than that.
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