Across
- 2. a number that can be expressed in the form a/b
- 6. the set of numbers 0, 1, 2, 3...
- 7. two numbers whose sum is 0
- 8. answer to a subtraction problem
- 9. answer to a multiplication problem
- 10. answer to an addition problem
Down
- 1. answer to a division problem
- 3. a number less than 0
- 4. set of all whole numbers and their opposites
- 5. a number greater than 0