48.5÷1648.5 32.4÷0.4532.4
1.8×2.9 1.8 0.25×3.63.6
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=