Adding and Subtracting Without Regrouping

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Across
  1. 2. 4,723+4,134
  2. 5. 274+424
  3. 6. 1,531+2,247
  4. 7. 68-5
  5. 9. 17+11
  6. 10. 56-24
  7. 11. 592-372
  8. 13. 3,884-3,531
Down
  1. 1. 71+6
  2. 3. 562+317
  3. 4. 9,745-3,133
  4. 5. 373+313
  5. 8. 397-85
  6. 9. 235-25
  7. 10. 654-321
  8. 12. 13+15