Odpowiedź:
1km=1000m=10000dm=1000000cm=10000000mm
1m=0,001km=10dm=100cm=1000m
1dm=0,0001km=0,1m=10cm=100mm
1cm=0,00001km=0,01m=0,1dm=10mm
1mm=0,000001km=0,001m=0,01dm=0,1cm
1 doba = 24h = 3600 min = 216 000 s
1h= 1/24 doby = 60 min = 3600 s
1 min = 1/60h = 60 s
1s = 1/3600 h = 1/60 min