1. (i) with e
(ii) with d

(iii) with a
(iv) with b
(v) with c
(vi) with f

2. a. 58 mm 
b. 4.2 cm

3. a. metres
b. kilometres
c. centimetres
d. millimetres

4.

a. 60 mm b. 8000 m c. 1.2 cm d. 0.23 m e. 23.4 cm
f. 3400 m g. 44 000 mm h. 1.203 km i. 0.324 m j. 39 000 000 mm

5. a. 534 cm
b. 120 mm
c. 2560 m
d. 5.7 km
e. 932.7 m