3. 30+2-28-36 50-96:6+40 39.2+22-74

1. \(30 + 2 - 28 - 36 = 32 - 28 - 36 = 4 - 36 = -32\) 2. \(50 - 96 : 6 + 40 = 50 - 16 + 40 = 34 + 40 = 74\) 3. \(39 \cdot 2 + 22 - 74 = 78 + 22 - 74 = 100 - 74 = 26\)