| A | B |
| algebra | a branch of mathematics which uses letters to represent unknown numbers |
| equation | formed of two equivalent expressions joined with an equal sign |
| expression | an algebraic phrase consisting of one or more terms |
| integer | a positive or negatiave whole number or zero |
| variable | a letter or symbol such as x which represents one or more unknown values |
| equivalent forms | different forms of numbers that name the same number |
| inverse operations | operations that undo each other |
| open sentence | a statement that constains at least one unknown |
| reciprocal | the fractional number that results from dividing one by the number |