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# Math Topic 2

### Variables, Expressions, And Properties

TermDefinition
Identity Property of Addition Adding zero to a number does not change the number
Distributive Property Multiplying a sum (or difference) by a number gives the same result as multiplying each number in the sum (or difference) by the number and adding (or subtracting) the products
Evaluate To find the value of an expression.
Associative Property of Multiplication The way numbers are grouped does not affect the product
Identity Property of Multiplication The product of a number and one is that number
Input/output table A table of related values
Order of operations A set of rules mathematicians use to determine the order in which operations are performed
Associative Property of Addition The way numbers are grouped does not affect the sum
Coefficient The number that is multiplied by a variable in algebraic expression . Example: For 6x + 5 the coefficient is 6
Substitution To replace a variable with a number
Commutative Property of Addition The order in which numbers are added does not change the sum of the numbers
Variable A quantity that can change or vary, often represented with a letter
Commutative Property of Multiplication The order in which numbers are multiplied does not change the product of the numbers
Algebraic expression A mathematical phrase that has at least one variable and one operation
Created by: SFABGRADE6-6

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