1. What units of length do you know? What units of mass do you know?
Starter
What units of length do you know?
What units of mass do you know?
What units of capacity do you know?

2. What do all of these words have in common?
rearrange
uneven
incorrect
irregular
unlucky
What do all of these words have in common?
illegal
disrespect
improper
uncertain
unnecessary

3. What do all of these words have in common?
re-arrange
un-even
in-correct
ir-regular
un-lucky
What do all of these words have in common?
il-legal
dis-respect
im-proper
un-certain
un-necessary

4. Prefix Meaning Length Mass Capacity
Kilo -
Thousand (1000)
kilometre
kilogram
kilolitre
Hecto -
Hundred (100)
hectometre
hectogram
hectolitre
Deca -
Ten (10)
decametre
decagram
decalitre
*base unit
One (1)
metre
gram
litre
Deci -
Tenths (0.1)
decimetre
decigram
decilitre
Centi -
Hundredths (0.01)
centimetre
centigram
centilitre
Milli -
Thousandths (0.001)
millimetre
milligram
millilitre

5. mm cm m km Convert 12 metres to centimetres = 1 200 cm
Divide by 10
Divide by 100
Divide by 1000 mm cm m km
Multiply by 10
Multiply by 100
Multiply by 1000
Convert 12 metres to centimetres
Convert 3 kilometres to millimetres
Convert 1.75 metres to millimetres
= cm
= mm
= mm

6. mg g kg Convert 350 grams to kilograms
Divide by 1000
Divide by 1000 mg g kg
Multiply by 1000
Multiply by 1000
Convert 350 grams to kilograms
Convert milligrams to kilograms
Convert kilograms to grams
= 0.35 kg
= 4.4 kg
= 56 g

7. mL cL L Convert 1.2 litres to centilitres = 120 cL
Divide by 10
Divide by 100 mL cL L
Multiply by 10
Multiply by 100
Convert 1.2 litres to centilitres
Convert 3300 millilitres to litres
Convert 75 centilitres millilitres
= 120 cL
= 3.3 L
= 750 mL

8. You also need to know:
1 cm³ = 1 mL
1m³ = 1000 L

9. Convert the following:
7 m to cm
6000 mg to g
0.5 L to mL
9 cm to mm
75 cm3 to mL
450 cL to L
370 m to km
190 mL to cL
8500 L to m3

10. Answers A: Lengths 600 cm 21 cm 5300 m 84 cm 0.054 km 67 000 mm
B: Weights
3 kg
5000 g
0.56 kg
0.035 kg
9480 g
0.256 kg
C: Volumes
2 L
50 L
45 L mL
52.5 cL
465.4 L
D: Exam Questions
140 mL = 0.14 L, Logan is wrong
= 19.5 km, Tony did not run 20 km
Amy is 1.83 m