3.28×2.73.28 15.5÷0.815.5
16.7×0.90.9 32.4÷1 3.24÷0.1
1.34÷0.25=÷1=
2.8÷0.85○2.8 253.1÷0.1○253.1 ×10
÷=
6.8×2= 4.2×4= 2.1×5= 1.9×0.1= 6×0.5=