| A | B |
|---|
| variable | A letter or symbol used to represent a number. |
| negative | The sign of the numbers less then zero on the number line. |
| variable expression | A group of numbers, variables, and operators. |
| distance | The space between two points. (Always positive.) |
| integers | ..., -3, -2, -1, 0, 1, 2, 3, ... |
| opposites | A positive number and its negative on a number line. |
| absolute value | The distance between an integer and zero on a number line. (Always positive.) |
| evaluate | To substitute the variable with a number in an expression, and simplify. |
| positive | The sign of the numbers greater than zero on the number line. |
| simplify | To reduce the complexity by combining like terms. |
| equation | A mathematical sentence that contains an equal sign. |
| coefficient | A number multiplied by a varialbe in an algebraic expression or equation. |
| constant | A quantity that does not change its value. |
| like terms | the parts of a variable expression or equation that have the same letter and exponent. |
