Find the following values without a calculator.
Which is smaller?
- 3.9 cm or 0.39 m
- 4.9 ℓ or 490 mℓ
- 99 km or 9900 m
(a)
1 m = 100 cm
0.39 m = 0.39 x 100 = 39 cm
3.9 cm < 39 cm
3.9 cm < 0.39 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
99 km = 99 x 1000 = 99000 m
99000 m > 9900 m
99 km > 9900 m
Answer(s): (a) 3.9 cm; (b) 490 mℓ; (c) 9900 m