Colum Addition With Grouping

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Across
  1. 2. 3428 + 6243
  2. 5. 8374 + 1274
  3. 8. 5482 + 4342
  4. 9. 2483 + 0234
Down
  1. 1. 0202 + 3917
  2. 3. 3862 + 2462
  3. 4. 1829 + 2143
  4. 6. 4821 + 1819
  5. 7. 7001 + 1009