8km-5km60m=8km-5.06km=2.94km 4元8角2分-3元5角=4.82元-3.5元=1.32元 2t9kg+450kg=2.009t+0.45t=2.459t
8km-5km60m=8km-5.06km=2.94km4元8角2分-3元5角=4.82元-3.5元=1.32元2t9kg+450kg=2.9t+0.45t=2.45t
8-5.06=2.94km4.82-3.5=1.32元2.009+0.45=2.459t