4.5×0.2= 1.9×0.01= 0.36÷0.04 5.5÷5=
80×0.5= 7.2÷0.8= 6.3+0.5= 1÷0.2=
÷3 ×
×3 ×1 27× 27÷
①9.07﹣22.78÷3.4
②3.4÷[0.5+0.3×4)
③0.4×5÷0.4×5
④34.52﹣17.87﹣12.23
⑤48×2.47+0.0247×5200