Numbers

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12345678
Across
  1. 4. 5-3
  2. 5. 8-1
  3. 6. 9-1
  4. 8. 3+6
Down
  1. 1. 8-3
  2. 2. 1+3
  3. 3. 0+1
  4. 4. 2+1
  5. 5. 5+1
  6. 7. 5+5