| __ | 1. | equation | | A. | One of two numbers whose product is 1 |
| __ | 2. | estimate | | B. | A diagram that shows the prime factors of a number |
| __ | 3. | factor tree | | C. | The greatest factor that two or more numbers have in common |
| __ | 4. | greatest common factor | | D. | A number close to an exact amount |
| __ | 5. | integers | | E. | An algebraic sentence that shows two quantities are equal |
| __ | 6. | lower quartile | | F. | The set of whole numbers and their opposites |
| __ | 7. | negative integers | | G. | Any integer less than zero |
| __ | 8. | prediction | | H. | The median of the lower half of a set of data |
| __ | 9. | reciprocal | | I. | A method of gathering information about a group |
| __ | 10. | survey | | J. | A reasonable guess as to the outcome of an event |