Addition and Subtraction crossword

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Across
  1. 1. 349 + 296
  2. 3. 705 − 468
  3. 6. 602 − 358
  4. 8. 852 − 431
  5. 9. 231 + 142
Down
  1. 1. 278 + 369
  2. 2. 422 + 155
  3. 4. 564 − 243
  4. 5. 456 + 187
  5. 7. 315 + 124