calculation

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The act, process, or result of calculating.
• noun An estimate based on probabilities.
• noun Careful, often cunning estimation and planning of likely outcomes, especially to advance one's own interests.

from The Century Dictionary.

• noun The act of calculating; the art, practice, or manner of computing by numbers; reckoning; computation: as, to find a result by calculation; the calculation was a difficult one.
• noun A series of arithmetical processes leading to a certain result.
• noun An estimate formed in the mind by comparing the various circumstances and facts which bear on the matter in hand.
• noun The habit of forming mental estimates; a trait or an element of intellectual character which shows itself in the habit of formulating and revolving schemes in the mind, or forecasting the progress or results of an undertaking.
• noun Synonyms Deliberation, circumspection, wariness, forethought, prudence.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act or process, or the result, of calculating; computation; reckoning, estimate.
• noun An expectation based on circumstances.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun mathematics (uncountable) The act or process of calculating.
• noun mathematics (countable) The result of calculating.
• noun countable Reckoning, estimate.
• noun countable An expectation based on circumstances.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun problem solving that involves numbers or quantities
• noun the procedure of calculating; determining something by mathematical or logical methods
• noun planning something carefully and intentionally