| A | B |
|---|
| Variable | A letter that represents an unknown number. |
| Constant | A known number. |
| Algebraic expression | An expression that contains one or more variables and may contain any number of constants. |
| Substitute | Replacing a variable with a number or an expression that represent a number. |
| Equation | A number sentence with the verb =. |
| Solution | A replacement or substitution that makes an equation or inequality true. |
| Equivalent expressions | Expressions that have the same value for all allowable replacements. |
| Term | A number, a variable, or a product of numbers and/or variables. |
| Factor | A number being multiplied |
| Natural Number | Also known as the counting numbers: 1, 2, 3, ... |
| Whole Number | The set of numbers: 0, 1, 2, 3, ... |
| Prime Number | A natural number that has exactly two different factors: the number itself and 1. |
| Composite Number | A whole number that has more than two factors. |
| Numerator | The number above the fraction line in a fraction. |
| Denominator | The number below the fraction line in a fraction. |
| Reciprocal/Multiplicative Inverse | Two numbers whose product is 1. |
| Set | A collection of objects. |
| Integer | All the whole numbers and their opposites. |
| Rational number | All numbers that can be named in the form a/b, where a and b are integers and b isn't 0. |
| Irrational Number | Is a number that cannot be named as a ratio of two integers. |
| Real Number | All the rational and irrational numbers. |
| Absolute Value | The distance a number is from 0 on the number line. |
| Opposites/Additive Inverse | Two numbers whose sum is zero. |
| Like Terms | Terms that have exactly the same variable factors. |
| Power/Exponent | A number that indicates how many times another number is multiplied by itself. |
| Base | The number being raised to a power. |
| Exponential notation | A representation of a number using a base raised to a power. |
| Axes | Two perpendicular number lines used to identify points in a plane. |
| Origin | The point on a coordinate plane where the two axes intersect. |
| Coordinates | The numbers in an ordered pair. |
| Quadrants | The four regions in to which the axes divide a plane. |
