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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 ?
He treated us around from behind the bar, and I decided that he had arithmetically evened things up handsomely.
I put it arithmetically, for the sake of putting it plain.
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.
Arithmetically brilliant, he was a crossword wizard.
in maximum 2 nos of Sl, provided required credential for two such works (to be arithmetically added for identical major works) satisfies the requirements in all respect for one such completion certificate.
The base effect means that if GDP growth as seen in the corresponding period of the previous year was too low, even a smaller rise will arithmetically give a high rate of growth now.
Yes, proporotional representation is arithmetically fairer but it produced leaders like Hitler.
Most individuals are trained to think in terms of pluses and minuses; in other words, they think arithmetically.
Eliminating all but the first and second candidates will, arithmetically, provide the winner with 50+ per cent of the votes included in the final count.
Sure, Stephen Hawking will tell us we're arithmetically still in with a chance of qualifying.
Arithmetically, the shortfall has doubled up in just three years.