Find the following values without a calculator.
Which is larger?
- 2.1 cm or 0.21 m
- 4.2 ℓ or 420 mℓ
- 89 km or 8900 m
(a)
1 m = 100 cm
0.21 m = 0.21 x 100 = 21 cm
2.1 cm < 21 cm
2.1 cm < 0.21 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
89 km = 89 x 1000 = 89000 m
89000 m > 8900 m
89 km > 8900 m
Answer(s): (a) 0.21 m; (b) 4.2 ℓ; (c) 89 km