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Răspuns:
a) 1km=10m=100dm=1000cm=10000mm
0,1km=1m=10dm=100cm=1000mm
b)1mm=0,1cm=0,01dm=0,001m
10mm=1cm=0,1dm=0,01m
100mm=10cm=1dm=0,1m
1000mm=100cm=10dm=1m