а) \(400 \div 25 - 5 + 40 \div 20 + 12 \times 4 = 16 - 5 + 2 + 48 = 61\); б) \(700 - 20 \div 4 + 480 \div 17 + 25 = 680 - 5 + 28 + 25 = 728\); в) \(420 \div 14 + 120 \div 6 - 25 \cdot 2 = 30 + 20 - 50 = 0\); г) \(320 + 240 \div 80 \cdot 60 \div 29 = 320 + 3 \cdot 60 \div 29 = 320 + 180 \div 29 \approx 320 + 6.2 \approx 326.2\).