Ответ:

  1. \(230 + 70 \cdot 3 = 230 + 210 = 440\).
  2. \((470 - 70) \cdot 2 = 400 \cdot 2 = 800\).
  3. \(600 + 180 : 6 + 9 = 600 + 30 + 9 = 639\).
  4. \(380 - 80 \cdot 3 = 380 - 240 = 140\).
  5. \(360 : (120 + 240) \cdot 4 = 360 : 360 \cdot 4 = 1 \cdot 4 = 4\).