17.3÷0.125÷8=17.3÷（0.125x8)=17.3÷1=17.3;
3.5÷0.56=7÷2÷(7x0.08)=7÷7÷(2x0.08)=1÷0.16=6.25;
8.5x9.9+0.85=8.5x9.9+8.5x0.1=8.5x(9.9+0.1)=8.5x10=85.