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Across
  1. 2. 50 + 50 =
  2. 7. 45 + 45 =
  3. 8. 30 + 30 =
  4. 9. 10 - 3 =
  5. 13. 70 - 20 =
  6. 14. 2 + 2 =
  7. 16. 2 + 1 =
  8. 17. 5 + 5 =
  9. 18. 40 + 30 =
Down
  1. 1. 20 + 10 =
  2. 3. 4 + 4 =
  3. 4. 10 + 10 =
  4. 5. 3 + 3 =
  5. 6. 6 - 1 =
  6. 10. 100 - 20 =
  7. 11. 5 + 4 =
  8. 12. 3 - 1 =
  9. 13. 20 + 20 =
  10. 15. 0 + 1 =