Find the following values without a calculator.
Which is larger?
- 4.2 cm or 0.42 m
- 1.4 ℓ or 140 mℓ
- 38 km or 3800 m
(a)
1 m = 100 cm
0.42 m = 0.42 x 100 = 42 cm
4.2 cm < 42 cm
4.2 cm < 0.42 m
(b)
1 ℓ = 1000 mℓ
1.4 ℓ = 1.4 x 1000 = 1400 mℓ
1400 mℓ > 140 mℓ
1.4 ℓ > 140 mℓ
(c)
1 km = 1000 m
38 km = 38 x 1000 = 38000 m
38000 m > 3800 m
38 km > 3800 m
Answer(s): (a) 0.42 m; (b) 1.4 ℓ; (c) 38 km