How many metres are there in $1$1 kilometre?
Convert $6$6 centimetres to millimetres.
Convert $80$80 millimetres to centimetres.
Convert $500$500 centimetres to metres.
Select and justify the most appropriate standard unit (i.e., millimetre, centimetre, decimetre, metre, kilometre) to measure length, height, width, and distance, and to measure the perimeter of various polygons
Solve problems requiring conversion from metres to centimetres and from kilometres to metres