ADDIZIONI E SOTTRAZIONI ENTRO IL 20

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Across
  1. 4. 6+4+7+3=
  2. 5. 19-9-5=
  3. 7. 4+7+6=
  4. 8. 16-8=
  5. 13. 8+6+5=
  6. 14. 3+9+4=
  7. 15. 18-3-3=
Down
  1. 1. 19-2-2=
  2. 2. 7+5+6
  3. 3. 17-2-1=
  4. 6. 17-5-2=
  5. 9. 4+3=
  6. 10. 20-6-1=
  7. 11. 6+5=
  8. 12. 12-8=