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The mathematics of integers, rational numbers, real numbers, or complex numbers under addition, subtraction, multiplication, and division.
adj. ar·ith·met·ic (ăr′ĭth-mĕt′ĭk) also ar′ith·met′i·cal (ăr′ĭth-mĕt′ĭ-kəl)
1. Of or relating to arithmetic.
2. Changing according to an arithmetic progression: The increase in the food supply is arithmetic.

[Middle English arsmetike, from Old French arismetique, from Medieval Latin arismetica, alteration of Latin arithmētica, from Greek arithmētikē (tekhnē), (art) of counting, feminine of arithmētikos, from arithmein, to count, from arithmos, number; see ar- in Indo-European roots.]

ar′ith·met′i·cal·ly adv.
a·rith′me·ti′cian (-tĭsh′ən) n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adv.1.arithmetically - with respect to arithmeticarithmetically - with respect to arithmetic; "this problem is arithmetically easy"
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References in classic literature ?
I put it arithmetically, for the sake of putting it plain.
He treated us around from behind the bar, and I decided that he had arithmetically evened things up handsomely.
Swift, like Defoe, generally increases the verisimilitude of his fictions and his ironies by careful accuracy in details, which is sometimes arithmetically genuine, sometimes only a hoax.
Among them is a very little boy, who chews tobacco like a very big one; and a droning gentleman, who talks arithmetically and statistically on all subjects, from poetry downwards; and who always speaks in the same key, with exactly the same emphasis, and with very grave deliberation.
There are dozens of electoral systems whose main aim is not to conjure majority governments from minority votes, but proportional representation: an elected body whose membership arithmetically reflects the electorate's votes - democratically, you might say.
All tenders will be arithmetically checked, any errors will be brought to the bidders attention.
As ystanbul's population increases arithmetically, transportation and other infrastructural problems are created and these increase geometrically.
I find this use of 100 very powerful, as it is too big to physically build the model but the number is easy to work with arithmetically.
Cato scholar Jagadeesh Gokhale, whose book Social Security: A User's Guide stands apart as the most piquant analysis of the program and its shortcomings, patiently explained in a number of different places that the fact that we currently index initial benefits to wages makes it arithmetically impossible for economic growth to save Social Security.
This book explores the relationship between such Abelian varieties over finite fields and over arithmetically interesting fields.
Arithmetically, more non-working parents than currently exist would have to be drawn into work and pay taxes to cover the costs of the policy.
In 1796 Thomas Malthus published An Essay on the Principle of Population in which he maintained that the population of the world increases geometrically with time while food supplies increase only arithmetically.