Mathematics

1234567891011
Across
  1. 5. numbers
  2. 6. more
  3. 8. x
  4. 10. -
Down
  1. 1. 5x4
  2. 2. title simplified
  3. 3. .
  4. 4. title
  5. 7. 12?2=6
  6. 9. 1+1
  7. 11. + without ittion