Choosing The Measuring Units
Converting between metric units is always about multiplying or dividing by 10, 100 or 1000. There is a link to it on the "Start" page of this module.
Example 1: cm to mm
A piece of wood is 6 cm long, How many is that?
Each has 10mm. So 6 cm will have 10 x 6 = 60 mm.
Example 2: kg to g
A box weighs 1.25 kg. How many grammes is that?
A kg has 1 000 g. So multiply by 1 000
1.25 x 1 000 = 1 250 grammes.
1 000 mm = 100 cm = 1 m
1 000 ml = 1 litre
1 000 grammes = 1 kg
Example 3: ml to litres
A plastic container holds 2 500 ml of liquid. What is it n litres?
You have to go from small units (ml) to large ones (litres). The nimber of litres will be less than the number of ml. So it must be a divide sum.
There are 1 000 ml in 1 litre, so divide by 1 000
Example 4: cm to m
Jackie is 178 cm tall. What is in m?
You are going from a smaller unit (cm) to a larger one (meters). The number of meters will be less than the number of cm. So it must be a divide sum.
There are 100 cm in 1 m, so divide by 100
178 / 100 = 1.78 m.
Abbreviation Full Follow
Length mm Millimetre
Weight g Grams
Capacity ml Mililitre