Addition

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Across
  1. 3. 367 + 481 = 8_
  2. 4. 719 + 253 = 9_
  3. 5. 546 + 392 = 9_
  4. 8. 539 + 376 = 9_
  5. 10. 823 + 165 = 9_
  6. 11. 714 + 263 = 9_
  7. 14. 152 + 846 = 9_
  8. 15. 402 + 578 = 9_
  9. 17. 157 + 834 = 9_
Down
  1. 1. 827 + 156 = 9_
  2. 2. 149 + 835 = 9_
  3. 3. 356 + 489 = 8_
  4. 6. 273 + 548 = 8_
  5. 7. 362 + 528 = 8_
  6. 8. 663 + 194 = 8_
  7. 9. 869 + 124 = 9_
  8. 12. 185 + 647 = 8_
  9. 13. 248 + 751 = 9_
  10. 16. 478 + 269 = 7_
  11. 18. 471 + 159 = 6_