Ответ:

  1. \(2 \cdot 3 \cdot 10 - 60 = 60 - 60 = 0\).
  2. \(5 \cdot 2 \cdot 3 - 70 = 30 - 70 = -40\).
  3. \(2 \cdot 4 \cdot 10 - 40 = 80 - 40 = 40\).
  4. \((17 - 43) : 40 = (-26) : 40 = -0.65\).
  5. \(90 : (69 - 59) = 90 : 10 = 9\).
  6. \((84 - 16) : 10 = 68 : 10 = 6.8\).

Ответ: 0; −40; 40; −0.65; 9; 6.8.