Find the following values without a calculator.
Which is smaller?
- 2.1 cm or 0.21 m
- 3.6 ℓ or 360 mℓ
- 71 km or 7100 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
3.6 ℓ = 3.6 x 1000 = 3600 mℓ
3600 mℓ > 360 mℓ
3.6 ℓ > 360 mℓ
(c)
1 km = 1000 m
71 km = 71 x 1000 = 71000 m
71000 m > 7100 m
71 km > 7100 m
Answer(s): (a) 2.1 cm; (b) 360 mℓ; (c) 7100 m