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Arithmetic
Arithmetic (from the Greek ἀριθμός arithmos, "number") is a branch of mathematics that consists of the study of numbers, especially the properties of the traditional operations between them—addition, subtraction, multiplication and division. Arithmetic is an elementary part of number theory, and number theory is considered to be one of the top-level divisions of modern mathematics, along with algebra, geometry, and analysis. The terms arithmetic and higher arithmetic were used until the beginning of the 20th century as synonyms for number theory and are sometimes still used to refer to a wider
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“
It's completely logical," explained the Dodecahedron. "The more you want, the less you get, and the less you get, the more you have. Simple arithmetic, that's all. Suppose you had something and added something to it. What would that make?"
"More," said Milo quickly.
"Quite correct," he nodded. "Now suppose you had something and added nothing to it. What would you have?"
"The same," he answered again, without much conviction.
"Splendid," cried the Dodecahedron. "And suppose you had something and
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”
― The Phantom Tollbooth
― The Phantom Tollbooth
