Ответ:

  1. \(18:3\cdot2=6\cdot2=\mathbf{12}\);
  2. \(4\cdot3:2=12:2=\mathbf{6}\);
  3. \(16:2\cdot3=8\cdot3=\mathbf{24}\);
  4. \(2\cdot9:6=18:6=\mathbf{3}\);
  5. \(2\cdot3\cdot3=6\cdot3=\mathbf{18}\);
  6. \(2\cdot4\cdot3=8\cdot3=\mathbf{24}\);
  7. \(21:7\cdot4=3\cdot4=\mathbf{12}\);
  8. \(3\cdot3\cdot3=9\cdot3=\mathbf{27}\);
  9. \(24:8\cdot5=3\cdot5=\mathbf{15}\).