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# Alg1A Unit 2

### Algebra Basics

TermDefinition
Closure Performing a certain operation on elements in a set will produce another element in the set
Rational Number A number that can be expressed as a ratio of two integers
Irrational Number A number whose decimal is nonterminating and nonrepeating
Set A finite or infinite group of elements
Element A number or variable included in a set
Axiom A mathematical statement accepted as true
Expression A mathematical statement comprising one or more mathematical terms
Term A variable, a coefficient, or the product of a coefficient and one or more variables (generally separated by addition or subtraction)
Variable A symbol that represents an unknown value
Coefficient The number multiplied by a variable
Factor A number, variable, or term that is multiplied by another number, variable, or term
Quantity An expression enclosed with parentheses
Associative Property of Addition Addition can be performed in any order regardless of how numbers are grouped (within parentheses) and the sum will still remain the same
Associative Property of Multiplication Multiplication can be performed in any order regardless of how numbers are grouped (within parentheses) and the product will still remain the same
Commutative Property of Addition Addition can be performed in any order and the sum will remain the same
Commutative Property of Multiplication Multiplication can be performed in any order and the product will still remain the same
Created by: schaffermath

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