Find the following values without a calculator.
Which is smaller?
- 3.2 cm or 0.32 m
- 2.7 ℓ or 270 mℓ
- 78 km or 7800 m
(a)
1 m = 100 cm
0.32 m = 0.32 x 100 = 32 cm
3.2 cm < 32 cm
3.2 cm < 0.32 m
(b)
1 ℓ = 1000 mℓ
2.7 ℓ = 2.7 x 1000 = 2700 mℓ
2700 mℓ > 270 mℓ
2.7 ℓ > 270 mℓ
(c)
1 km = 1000 m
78 km = 78 x 1000 = 78000 m
78000 m > 7800 m
78 km > 7800 m
Answer(s): (a) 3.2 cm; (b) 270 mℓ; (c) 7800 m