Maths

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Across
  1. 2. 198 + 277 =
  2. 4. 1142 - 328 =
  3. 5. 350 + 277 =
  4. 7. 901 - 579 =
  5. 9. 850 + 910 =
  6. 11. 1006 - 428 =
  7. 12. 1160 - 296 =
  8. 13. 3500 + 5200 =
  9. 15. 137 + 98 =
Down
  1. 1. 1317 + 1277 =
  2. 3. 718 + 844 =
  3. 4. 4700 + 3650 =
  4. 6. 463 + 247 =
  5. 7. 999 - 611 =
  6. 8. 864 - 660 =
  7. 10. 990 - 332 =
  8. 11. 1000 - 420 =
  9. 14. 617 + 146 =