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Arithmetic is the most basic part of math — adding, , multiplying, and dividing numbers. It's what you learn first, before algebra or geometry. People also use the word loosely outside of school, for the plain numbers and calculations behind a real situation: 'the arithmetic doesn't add up' means the numbers, costs, or plan simply don't work out.
算術
組成from Greek 'arithmos', meaning 'number'.
原始詞典資料5 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
arithmeticnoun詞源 1[əˈɹɪθmətɪk]
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The mathematics of numbers (integers, rational numbers, real numbers, or complex numbers) under the operations of addition, subtraction, multiplication, and division.
- Note that all correctly rounding arithmetics satisfy property A1, as do those with properly truncating addition. All faithful binary arithmetics and all arithmetics with either properly truncating or correctly chopping addition satisfy property A2.
- [The researchers] noticed many of their pieces of [plastic marine] debris sported surface pits around two microns across.[…]Closer examination showed that some of these pits did, indeed, contain bacteria, and that in several cases these bacteria were dividing and thus, by the perverse arithmetic of biological terminology, multiplying.
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datedNumber theory.
arithmeticadj詞源 1[əˈɹɪθmətɪk]
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Increasing or decreasing by an arithmetic progression.
- Near-synonym: linear
- Growth in the most mature markets is likely to be arithmetic; on what rational basis could one hope for exponential growth there?
arithmeticadj詞源 2/æɹɪθˈmɛtɪk/
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mathematicssciencesOf, relating to, or using arithmetic; arithmetical.
- arithmetic geometry
- Moreover, the latest work of Katz, involving the so-called 'Larsen alternative', provides new criteria, of a very arithmetic nature, to (almost) determine the rational monodromy group
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arithmeticOf a progression, mean, etc, computed solely using addition.
- arithmetic progression
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。