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A binary operator is a mathematical operator that performs some operation (eg addition, multiplication) on two operands to produce a result.

Commutativity is the property of some binary operations whereby, the order of the operands does not matter. For example, a + b = b + a

Associativity is the property of some binary operators whereby, if there is a sequence of such operations, the order in which the operations are carried out does not matter. However, the order of the operands may affect the result. For example, (a + b) + c = a + (b + c) and so we may write them simply as a + b + c.

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Q: What is commutative and associative in math?
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