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### 13 Cards in this Set

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 What are behavior rules for numbers called? axioms or postulates What is the commutative property of addition? AKA order doesn't make a difference- property of multiplication. a + b = b + a What is the commutative property of multiplication? a x b = b x a What is the associative property of addition? AKA the where you put the parentheses doesn't make a difference - property. (a + b) + c = a + (b + c) for any three numbers a, b and c What is the associaive property of multiplication? (a x b) x c = a x (b x c) What is the acronym used to memorize the order of operations? PEMDAS parenthese exponent multiplication division addition subtraction If you add together two orm more natural numbers (counting numbers) you will always get a natural number for the answer. If you multiply together tow natural numbers, the result will always be a natural number. What is the expanded way to write a x (b + c) (a x b) + (a x c) or a x b + a x c What does a X 2 also equal? a x 2 = a + a example 6 x 2 = 6 + 6 or 2(6) = 6 What is a therom? A therom is a proven result rather than a assumed one. Any even number can be written how, with n being a natural number. 2 x n Any odd number can be written how, with n being a natural number 2 x n + 1