Find the following values without a calculator.
Which is smaller?
- 2.1 cm or 0.21 m
- 3.9 ℓ or 390 mℓ
- 63 km or 6300 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
3.9 ℓ = 3.9 x 1000 = 3900 mℓ
3900 mℓ > 390 mℓ
3.9 ℓ > 390 mℓ
(c)
1 km = 1000 m
63 km = 63 x 1000 = 63000 m
63000 m > 6300 m
63 km > 6300 m
Answer(s): (a) 2.1 cm; (b) 390 mℓ; (c) 6300 m