8.4÷1.4÷3 =8.4÷(1.4*3 )=8.4÷4.2=50.84÷2.5 =0.84÷10*4=0.084*4=3.360.99÷15 =0.99÷3÷5=0.33÷5=0.33÷10*2=0.033*2=0.0660.36×102+0.28 =0.36×(100+2)+0.28 =0.36×100+0.36×2+0.28 =36+(0.72+0.28)=3...