Find the following values without a calculator.
Which is smaller?
- 3.2 cm or 0.32 m
- 4.2 ℓ or 420 mℓ
- 68 km or 6800 m
(a)
1 m = 100 cm
0.32 m = 0.32 x 100 = 32 cm
3.2 cm < 32 cm
3.2 cm < 0.32 m
(b)
1 ℓ = 1000 mℓ
4.2 ℓ = 4.2 x 1000 = 4200 mℓ
4200 mℓ > 420 mℓ
4.2 ℓ > 420 mℓ
(c)
1 km = 1000 m
68 km = 68 x 1000 = 68000 m
68000 m > 6800 m
68 km > 6800 m
Answer(s): (a) 3.2 cm; (b) 420 mℓ; (c) 6800 m