Find the following values without a calculator.
Which is smaller?
- 3.3 cm or 0.33 m
- 3.9 ℓ or 390 mℓ
- 69 km or 6900 m
(a)
1 m = 100 cm
0.33 m = 0.33 x 100 = 33 cm
3.3 cm < 33 cm
3.3 cm < 0.33 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
69 km = 69 x 1000 = 69000 m
69000 m > 6900 m
69 km > 6900 m
Answer(s): (a) 3.3 cm; (b) 390 mℓ; (c) 6900 m