Choosing appropriate units

The commonly used metric units of length include:

  • kilometres (\({km}\)) : 1km = 1,000m
  • metres (\({m}\)) : 1m = 100cm
  • centimetres (\({cm}\)) : 1cm = 10mm
  • millimetres (\({mm}\)) : 1,000mm = 1m

The commonly used metric units of mass include:

  • gram (\({g}\)) : 1,000g = 1kg
  • kilogram (\({kg}\)) : 1kg = 1,000g
  • tonne (\({t}\)) : 1t = 1,000kg
  • milligram (\({mg}\)) : 1,000mg = 1g

The commonly used metric units of capacity include:

  • litre (\({l}\)) : 1l = 1,000ml
  • millilitre (\({ml}\)) : 1,000ml = 1l
  • cubic centimetre (\({cc}\)) : 1cc = 1ml