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Probably of Babylonian origin, an abacus is a calculating instrument that uses beads that slide along a series of wires or rods set in a frame to represent the decimal places.
Mar 21, 2024
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An abacus consists of a two-dimensional array of slidable beads (or similar objects). In their earliest designs, the beads could be loose on a flat surface or ...
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The standard abacus can be used to perform addition, subtraction, division and multiplication; the abacus can also be used to extract square-roots and cubic ...
Abacus
Mathematical tool
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An abacus, also called a counting frame, is a hand-operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Hindu-Arabic numeral system. An abacus consists of a... Wikipedia
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Posted: Jun 21, 2016
Posted: Jun 21, 2016
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[Reliability]-The abacus is a classic form of calculator. The abacus/Soroban has a long history. It was a very commonly used counting tool before the invention ...
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This is a 13-rod abacus. The frame measures 6 1/8 x 3 1/4 inches and the bead diameter is 3/8 inch. Red felt backing prevents beads from slipping.