1
a. metres b. kilometres c. metres d. centimetres

2. a. 57 mm
b. 5.0 cm
c. 78 mm

3. (i) The width of a laptop computer 30 cm
(ii) The height of a tennis player 195 cm
(iii) The length of a snowboard 2.1 m
(iv) The length of a calculator 120 mm
(v) The thickness of a paperback book 12 mm
(vi) The length of a space rocket 30 m

4.

mm
cm
m
km
590
59
0.59
0.00059
1 400
140
1.4
0.0014
2 300 000
230 000
2 300
2.3

5.

a
7000 m
b
6349 m
c
12.32 m
d
12.24 m
e
1450 m
f
0.855 m

6.

a. 0.5 cm b. 4000 m
c. 1.2 m d. 23 mm
e. 0.234 m f. 140 000
g. 0.44 km h. 12 000 cm
i. 32.4 cm j. 3 900 000