Ответ:а) \(\frac18:0.4=0.3125\);б) \((5.75-3.25):0.8=2.5:0.8=3.125\);в) \((1-0.5556):\frac{11}{40}=0.4444:\frac{11}{40}=1.616\);г) \(12.525:(0.8+0.7)=12.525:1.5=8.35\).