Englishfor English speakers
arithmetic
Noun
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The kind of mathematics in which addition, subtraction, multiplication, and division are done on numbers.
My son is starting to do simple arithmetic like math2 + 2 = 4/math.
number
Noun
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A symbol that that is used to describe quantity; a numeral.
2, 5589, and 0 are all numbers.
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A few.
She has a number of dictionaries--four or five, I think.
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A musical, theatrical, or literary selection or production.
She chose a number from "Swan Lake" for her dance recital.
number
Verb
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To label objects with numbers.
Number the baskets so that we can find them easily.
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To total or count; to amount to.
I don’t know how many books are in the library, but they must number in the thousands.