Algebra 1 CP Vocabulary (Unit 1)

Denominator

The part of a fraction that is below the line

Numerator

The part of a fraction that is above the line

Constant

A fixed, unchanging number

Variable

A letter that represents an unknown value

Coefficient

A number that is multiplied by a variable

Term

A single part of an expression (usually separated by addition or subtraction symbols) that consists of a single number, single variable, or the product of a variable and number

Expression

A mathematical phrase containing one or more terms and mathematical operations (does not include an equal or inequality sign)

Equation

A mathematical statement that two things are equal (contains an $=$ sign)

Inequality

A mathematical statement that two things are not equal (contains a $<$, $>$, $\le$, $\ge$)

Sum

Addition ($+$)

Difference

Subtraction ($-$)

Product

Multiplication ($\times$)

Quotient

Division ($\div$)

Distributive Property

$$a(b + c) = ab + ac$$

PEMDAS

Acronym for remembering the Order of Operations (Please Excuse My Dear Aunt Sally)

Rational Number

A number that can be written as a ratio of integers (fraction). In decimal form, the decimal either stops or repeats in a pattern.

Irrational Number

A number that can never be written as a fraction. In decimal form, it goes on forever and never repeats in a pattern.