Ответ:

  1. \(72 : 12 \cdot 9 = 6 \cdot 9 = 54\).
  2. \(7 \cdot 15 : 10 = 105 : 10 = 10.5\).
  3. \(66 : 12 : 8 = 5.5 : 8 = 0.6875\).
  4. \(540 - 68 - 5 = 472 - 5 = 467\).
  5. \(930 - 74 \cdot 5 = 930 - 370 = 560\).
  6. \(120 - 80 : 4 - 6 = 120 - 20 - 6 = 94\).

Ответ: 54; 10.5; 0.6875; 467; 560; 94.