Across
- 2. using letters or symbols to represent a number you don't know
- 4. what you do first in order of operations
- 7. to make easier
- 8. to determine the value of
- 9. in the middle of the earth and makes places close to it hot
Down
- 1. used together with longitude to specify precise location
- 3. a math problem
- 5. the sun is made of this
- 6. half of the earth (north and south)