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Numerical expression

expression containing numbers and operations

Inverse operations

operations which undo each other

Identity Property

14 + 0 = 14 or 23 * 1 = 23

Perimeter

distance around any polygon

Set

a well defined collection of elements

Rational

repeating and terminating numbers

Equation

mathematical expressions separated by equal signs

Variable

a letter used to represent a number

Whole Numbers

The set of numbers { 0, 1, 2, 3, ...}

Opposites

two numbers whose sum is zero

Absolute Value

the distance a number is from zero on the number line

Real Numbers

all rational and irrational numbers

Like Terms

terms whose variable parts are exactly the same

Constant

a term with no variable factor

Open Sentence

an equation containing a variable

Algebraic Expression

an expression containing operations, numbers and variables

Area

the number of square units in a figure

Associative Property

property where what is in parentheses changes

Integers

The set of numbers { ...-2, -1, 0, 1, 2,....}

Subset

a set that consists of elements from a given set

Perfect Squares

a number whose square roots are integers

Commutative Property

Property where order does not matter

Irrational

non-repeating or non-terminating numbers

Square Root

a number "a" is this of a number "b" if a squared = b.

Natural Numbers

The set of numbers { 1, 2, 3, 4,....}

Radicand

the expression under the radical

Power

the base and exponent of an expression of the form "a" raised to the "n."

Evaluate

to substitute a given number for each variable and simplify

Base

a number that is multiplied repeatedly

Order of Operations

steps used to simplify a mathematical expression

Exponent

a number that shows repeated multiplication

Numerator

the number above the fraction bar

Distributive Property

property which allows you to get rid of parentheses

Radical

an expression made up of a radical symbol and radicand

Terms

separated by plus and minus signs

Reciprocals

two numbers whose product is one

Simplify

to put an expression into simplest form

Coefficient

the number in front of a variable