Addition and subtraction

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Across
  1. 2. twenty-five + seven
  2. 3. twelve - four
  3. 5. thirty + seventeen
  4. 8. twenty-two - three
  5. 9. sixteen - three
Down
  1. 1. twenty + twenty
  2. 2. twenty + fifteen
  3. 4. fifteen + six
  4. 6. twenty - three
  5. 7. fourteen - five