2.4÷1.22.4 0.35÷0.99 0.35 1.99÷11.99
①1.58×99+1.58
②50.4÷3.2×2.08
③0.125×32×2.5
④0.8×6.3﹣0.8×3.8
= ﹣0.25= 0÷5=
= 5.4×= 80×0.7=