Addition/Subtraction Crossword

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12345678910
Across
  1. 2. 11 + 5
  2. 4. 65 + 15
  3. 5. 5 + 9
  4. 7. 10 + 20
  5. 9. 1 + 2
  6. 10. 7 - 7
Down
  1. 1. 1000 - 900
  2. 3. 30 - 10
  3. 6. 10 - 4
  4. 7. 30 - 20
  5. 8. 8 - 6
  6. 9. 20 + 10