64km-22dam=?m
64km=64000m
22dam=220m
64000m--220m=63780
750cm-120mm=?mm
750cm=7500mm
7500mm-1200mm=6300mm
32km-21dam=?dăm
32km=3200dam
3200dam-21-dam=3179dam
1m-15cm=?
1m=100cm
100cm-15cm=85cm
650m-1500dm=?cm
650m=65000cm
1500dm=15000cm
65000-15000=50000cm
8km-8hm=?dăm
8km=800dam
8hm=80dam
800dam-80dam=720dam
