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subtraction

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subtraction

Taking one number or quantity away from another, or finding the difference between two quantities; it is one of the four basic operations of arithmetic. Subtraction is neither commutative:

a − b ≠ b − a

nor associative:

a − (b − c) ≠ (a − b) − c.

For example,

8 − 5 ≠ 5 − 8

7 − (4 − 3) ≠ (7 − 4) − 3.



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? Mentioned in ? References in classic literature
 
Everything with him was multiplication or subtraction.
The Count of Monte Cristo by Dumas, Alexandre View in context
And in what way a knowledge of addition and subtraction and the catechism is going to improve their material condition, I never could make out.
Anna Karenina by Tolstoy, Leo View in context
By means of addition, subtraction, multiplication, and division, settle everything somehow, and never wonder.
Hard Times by Dickens, Charles View in context
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