Expressões numéricas

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Across
  1. 2. 4x9-20+12:2=
  2. 6. 2x(3+7-4)+28=
  3. 9. 8+[3x(5-2)-7]-3=
  4. 10. 4+(2x7+6)-5=
  5. 11. (12+8):(7-3)+4=
  6. 13. 6+[4x(7-5)+3]=
  7. 14. 10-[3+(5+1)-3]=
Down
  1. 1. 2+(3x5)-12=
  2. 3. 6+2x5-5=
  3. 4. 5+{2+[12-(3x3)+4]+2}=
  4. 5. (3+4)x(5-2)-6=
  5. 7. 8x3-5x3+12:2-2=
  6. 8. 20:5x6-4=
  7. 12. 32:(5x2-6)=