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# Algebra Vocab: U. 1

### Vocabulary List for Math Class Unit One

TermDefinition
Ratio two quantities, a comparison of two numbers, can be written as: # to #, # : #, or #/#
Variable an unknown, represented by a letter
Rates show up everywhere in the real world, ratios of two quantities, both of which are changing or varying
Expression a group or combination or numbers that we know and ones we don't (variables), does not have an equal sign
Order of Operations (PEMDAS) the "rules" for solving an expression, the order of steps you need to take to solve an expression, order: (parentheses, exponents, multiplication and division, addition and subtraction)
Commutative Property of Addition gives permission to rewrite addition problems in different orders than what are normally given, changes the order of the numbers without changing the sum
Commutative Property of Multiplication gives permission to rewrite multiplication problems in different orders than what are normally given, changes the order of the numbers without changing the product
Associative Property of Addition gives permission to rewrite addition problems in different orders than what are normally given, changing the location of the parentheses around numbers without changing the sum
Associative Property of Multiplication gives permission to rewrite multiplication problems in different orders than what are normally given, changing the location of the parentheses around numbers without changing the product
Evaluating Expressions finding the results of the calculations of an expression when all variable values are known
Binomial an expression with two terms
Equivalent Expressions two (or more) algebraic expressions that have the same value for every value of the substitution variable (or variables); no matter what value you stick in for x (or y or z) the two expressions come out equal
Factoring Expressions the process of writing an equivalent expression as purely the product of other expressions
Distributive Property of Addition over Multiplication gives permission to rewrite multiplication problems in different orders than what are normally given; if a, b, and c all represent real numbers then: a (b + c) = a x b + a x c; applying a multiplication to all parts of a sum
Distributive Property of Addition over Division gives permission to rewrite division problems in different orders than what are normally given; if a, b, and c all represent real numbers then: b + c / a = b / a + c / a; applying a division to all parts of a sum
Trinomial an expression with three terms
Created by: Amo.Alexa.1920