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Across
  1. 2. How much is 4+2
  2. 4. How much is 1+1
  3. 5. How much is 9+4
  4. 8. How much is 12-3
  5. 10. How much is 12+6
  6. 11. How much is 10-3
  7. 12. How much is 19-4
  8. 13. How much is 6+4
  9. 14. How much is 11+9
  10. 15. How much is 5+3
  11. 16. How much is 15-4
  12. 17. How much is 2-1
Down
  1. 1. How much is 11+5
  2. 3. How much is 2+2
  3. 5. How much is 7+5
  4. 6. How much is 20-1
  5. 7. How much is 8-3
  6. 9. How much is 20-3
  7. 12. How much is 8+6
  8. 13. How much is 5-2