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# Math 7 Unit 2 Vocab

### Unit 2: Expressions and Equations

TermDefinition
expression A mathematical phrase that contains operations, numbers, and/or variables.
equation A mathematical sentence that contains an equals sign.
term a single mathematical expression. It may be a single number (positive or negative), a single variable (a letter), several variables multiplied but never added or subtracted
Coefficient number in front of a variable
like terms Terms that contain the same variables raised to the same power.
simplify to write an expression or fraction in a simpler form
Distributive Property a property indicating a special way in which multiplication is applied to addition of two or more numbers in which each term inside a set of parentheses can be multiplied by a factor outside the parentheses, such as a(b + c) = ab + ac
Factoring rewriting an expression as the product of its factors. undoing distribution
isolate to separate from others
Variable A symbol used to represent a quantity that can change
inverse opposite
operation addition, subtraction, multiplication, division
Solution an answer to a problem. a single number (NOT an expression)
evaluate To replace variables with numbers and then simplify an expression. a single number answer (NOT an expression).
algebra A branch of mathematics that involves expressions with variables and symbols.
two-step equation An equation that contains two operations. Example: 2n + 8 = 12
constant A term without a variable. A quantity that does not change, it is usually a number.
algebraic expression Mathematical combination of variables, numbers and at least one operation. Example: 5n + 7
Created by: MissHewitt
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