A statement that two expressions are equal. It has an equal sign.
Ex.: 32 + 45 = 77
(4 x 5 -2) / 6 = 3

One or more numbers, variables, or numbers and variables with one or more operations.
Ex.: 8 - x
12 + 5

Combine like terms and perform operations until all terms have been combined.
Ex.: n + 5n combined would be 6n

Substitute a value for a letter (or symbol) and then simplify the expression.
Ex.: a = 4
18 - (a + 5) = ___

The result of subtracting.

The answer when adding two or more addends.

An equation that shows the structure of the information in a problem.

An equation that shows the operation that can be used to solve the problem. The variable is all alone.

A pair of whole numbers whose product is that number.

Describe quantities as greater than, less than, or equal to each other.

Bars that represent the larger amount and smaller amount in a situation.