Test Crossword Puzzle

123456789
Across
  1. 1. What goes between words
  2. 3. Doing the compression thing
  3. 5. An algorithm
  4. 8. Not Multiplication
  5. 9. Something good
Down
  1. 2. Something bad
  2. 4. First number
  3. 6. Doing the other thing
  4. 7. Not subtraction