PreAlgebra Semester 1 Final Exam Vocabulary

The distance around a geometric figure.

Operations that undo each other, such as addition and subtraction.

The vertical number line which helps to form the coordinate system.

A value for the variable that makes an equation true. For x+7=19, it is x=12.

A mathematical sentence that contains < or >.

A placeholder for any value, often a lowercase letter is used.

A mathematical sentence that contains an equals sign (=).

A decimal whose digits repeat in groups of one or more without end. Example: 0.12121212...

The horizontal number line which helps to form the coordinate system

The sum of data divided by the number of items in the data set. Also called the average

A set of ordered pairs.

A number that corresponds with a point on a number line

Expressions that contain the same variables to the same power, such as 2x and 5x

A movement of a geometric figure.

A decimal whose digits end. Can be written as a fraction with a denominator of 10, 100, 1000, and so on.

The point (0,0) at which the number lines intersect in a coordinate system.

The set of all x-coordinates of a relation.

The set of all y-coordinates of a relation.

Expressions that have the same value.

The distance a number is from zero on a number line. In symbols: |-4|=4

A number less than zero

The number part of a term that contains a variable.

The four regions into which the x-axis and y-axis separate the coordinate plane.

A number that can be written as a fraction.

The branch of mathematics dealing with symbols and variables.

Fractions that have the same denominator

Fractions with different denominators.

A term without a variable (just a number)

To find the numerical value of an expression

An equation that contains two operations

Two numbers with the same absolute value, but different signs

The whole numbers and their opposites (positive and negative numbers and zero).

The measure of the surface enclosed by a geometric figure.

An integer and its opposite

An algebraic expression that has no like terms and no parentheses.

Two numbers whose product is one. Found by flipping the top and bottom of a fraction.

To multiply a sum by a number, multiply each number in parentheses by the number outside. Example 2\left(x+3\right)=2x+6

In repeating decimals, the line or bar placed over the digits that repeat.

Formed by the intersection of two number lines that meet at their zero points.