(1)(16.8+1.47)÷0.7×1.2 =18.27÷0.7×1.2=26.1×1.2=31.32;(2)3.84×1.25×8 =3.84×(1.25×8)=3.84×10=38.4;(3)10.5÷[(0.55-0.48)×0.1]=10.5÷(0.07×0.1)=10.5÷0.007=3500.