Find the following values without a calculator.
Which is larger?
- 4.5 cm or 0.45 m
- 2.9 ℓ or 290 mℓ
- 30 km or 3000 m
(a)
1 m = 100 cm
0.45 m = 0.45 x 100 = 45 cm
4.5 cm < 45 cm
4.5 cm < 0.45 m
(b)
1 ℓ = 1000 mℓ
2.9 ℓ = 2.9 x 1000 = 2900 mℓ
2900 mℓ > 290 mℓ
2.9 ℓ > 290 mℓ
(c)
1 km = 1000 m
30 km = 30 x 1000 = 30000 m
30000 m > 3000 m
30 km > 3000 m
Answer(s): (a) 0.45 m; (b) 2.9 ℓ; (c) 30 km