Find the following values without a calculator.
Which is smaller?
- 4.2 cm or 0.42 m
- 3.8 ℓ or 380 mℓ
- 23 km or 2300 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
3.8 ℓ = 3.8 x 1000 = 3800 mℓ
3800 mℓ > 380 mℓ
3.8 ℓ > 380 mℓ
(c)
1 km = 1000 m
23 km = 23 x 1000 = 23000 m
23000 m > 2300 m
23 km > 2300 m
Answer(s): (a) 4.2 cm; (b) 380 mℓ; (c) 2300 m