3km= dm= cm;8000mm= m= km 7.1h= min= s;2h15min= s;6min2s= s 换算单位我最不行了
问题描述：
3km= dm= cm;8000mm= m= km 7.1h= min= s;2h15min= s;6min2s= s 换算单位我最不行了
答
3km= 30000dm= 300000cm;8000mm= 8m=0.008 km 7.1h=426 min= 25560s;2h15min= 8100s;6min2s=362 s