Cruciverba matematico

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Across
  1. 3. =35+28-40
  2. 5. =8x11
  3. 7. =250-180+32
  4. 8. =2/3 di 75
  5. 10. =50-14
Down
  1. 1. =21:3
  2. 2. =6x20
  3. 4. =100+31+50-73-27
  4. 6. =105:3
  5. 9. =2/8 di 400