Math

12345678910
Across
  1. 3. 1+1?2
  2. 7. putting more on
  3. 8. take away
  4. 10. one number over another
Down
  1. 1. times numbers
  2. 2. +
  3. 4. -
  4. 5. data goes on a?
  5. 6. all of this is????
  6. 9. data goes in a?