解答解:(1)1.7cm=0.017m; (2)3.05dm2=305cm2; (3)48mL=0.048L; (4)402dm2=4.02m2; (5)0.73m3=730dm3; (6)0.5km=500m. 故答案为:0.017,305,0.048,4.02,730,500. 点评单位换算首先要弄清是由高级单位化低级单位还是由低级单位化高级单位,其次记住单位间的进率;由高级单位化低级单位乘进率,由低级...