| A | B |
|---|
| additive inverse | Two numbers are additive inverses of each other if their sum is 0: -4+4=0. |
| algebraic expression | An expression that is written using one or more variables: 2a+5 or a+b. |
| equation | A sentence that uses an equals sign to show that two groups are equal: y=3+7. |
| inequality | A sentence that shows the relationship between quantities that are not equal, using <, >, <, > sings: 6<9. |
| inverse operation | Operations that undo each other: 20-5=15 and 15+5=20. |
| multiplicative inverse | The reciprocal of a number: The muliplicative inverse of 2 is 1/2. |
| variable | A letter used to represent one or more numbers: in 5a and 2y=8; a and y are variables. |
| reciprocal | common name for multiplicative inverse |
| opposite | common name for additive inverse |
