Expressões numéricas

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