Ответ:
1. \(540 : (2 \cdot 4) + 140 = 540 : 8 + 140 = 67.5 + 140 = 207.5\).
2. \(348 + (620 - 200) : 7 = 348 + 420 : 7 = 348 + 60 = 408\).
3. \(24 \cdot 3 + 27 \cdot 2 = 72 + 54 = 126\).
4. \(96 : 4 + 350 - 70 = 24 + 350 - 70 = 304\).
Ответ: 207,5; 408; 126; 304.
