Across
- 4. numbers ,
- 7. , a set that is composed entirely of members of some other set
- 9. numbers , numbers that can be expressed as the ratio a/b, where "a" and "b" are integers and "b" does not equal zero
Down
- 1. numbers , all numbers used for counting objects
- 2. numbers , all natural numbers including zero
- 3. , positive and negative whole numbers
- 5. that can't be expressed as the ratio a/b, where "a" and "b" are integers and "b" does not equal zero
- 6. numbers , the set of rational numbers together with the set of irrational numbers
- 8. , a group(s) of common attributes