You should know about the following common metric units of measurement:
Length and Distance
1 km = 1000 m
1 m = 100 cm = 1000 mm
1 dm = 10 cm
1 cm = 10 mm
Mass
1 t = 1000 kg
1 kg = 1000 g
1 g = 1000 mg
Capacity
1 l = 1000 ml = 100 cl
10 ml = 1 cl
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