Find the following values without a calculator.
Which is smaller?
- 3.3 cm or 0.33 m
- 4.9 ℓ or 490 mℓ
- 42 km or 4200 m
(a)
1 m = 100 cm
0.33 m = 0.33 x 100 = 33 cm
3.3 cm < 33 cm
3.3 cm < 0.33 m
(b)
1 ℓ = 1000 mℓ
4.9 ℓ = 4.9 x 1000 = 4900 mℓ
4900 mℓ > 490 mℓ
4.9 ℓ > 490 mℓ
(c)
1 km = 1000 m
42 km = 42 x 1000 = 42000 m
42000 m > 4200 m
42 km > 4200 m
Answer(s): (a) 3.3 cm; (b) 490 mℓ; (c) 4200 m