Math Crossword: Subtraction 0-20

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1234567891011
Across
  1. 4. 13-6=
  2. 7. 10-4=
  3. 8. 19-16=
  4. 10. 19-7=
  5. 11. 17-4=
Down
  1. 1. 18-3=
  2. 2. 14-10=
  3. 3. 16-11=
  4. 5. 15-7=
  5. 6. 20-9=
  6. 9. 17-9=