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# Math topic2

### Variables,Expressions ,and properties

TermDefinition
Algebraic expression A mathematical phrase that has at least one operation
Variable A quantity that can change or vary, often represented with a letter
Associative property of addition The way numbers are grouped does not affect the sum
Coefficient The number that is multiplied by a veritable in an algebraic expression. Ex 6x+5the 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 number
Commutative property of multiplication The orders in which numbers are multiplied does not change the product of the numbers
Evaluate To find the value of an expression
Input/output table A table related values
Order of operations A set of rule mathematicians use to determined the order in which operation are performed

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