the white dots and unit bar in abacus are called what
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ABACUS is a simple calculating tool used to do all the basic arithmetic calculations like addition, subtraction, multiplication and division. Abacus consist of rods in which beads move up and down. A beam divides the abacus rod into two parts. ... There is a unit point (a white dot) marked at every 3rd rod on the abacus.
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the unit bar is called beam
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