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# Calculation  ( Elementary Arithmetic )

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A calculation is a deliberate process that transforms one or more inputs into one or more outputs or results. The term is used in a variety of senses, from the very definite calculation of using an , to the vague of calculating a strategy in a competition, or calculating the chance of a successful relationship between two people.

For example, 7 by 6 is a simple algorithmic calculation. Extracting the or the of a number using mathematical models is a more complex algorithmic calculation.

Statistical estimations of the likely election results from opinion polls also involve algorithmic calculations, but produces ranges of possibilities rather than exact answers.

To calculate means to determine mathematically in the case of a number or amount, or in the case of an abstract problem to deduce the answer using , or . The English word derives from the calculus, which originally meant a (from Latin link=no), for instance the small stones used as a counters on an (link=no, translit-std=ALA-LC). The abacus was an instrument used by Greeks and Romans for arithmetic calculations, preceding the and the electronic calculator, and consisted of perforated pebbles sliding on iron bars.

Calculation is a prerequisite for .

• Calculus (disambiguation) — list of general methods of calculation by application area
• — theoretical notion to categorize calculability
• — business application of calculation
• List of algorithms — fully formalized, computer-executable methods of calculation
• Mental calculation — performing arithmetics using one's brain only

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