Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 2 12 h = _____ min
- 7 820 m = _____ m (Give the answer in decimal.)
- 4 15 km = _____ m
- 6 25 kg = _____ g
(a)
1 h = 60 min
12 h =
12 x 60 = 30 min
2
12 h = 120 + 30 = 150 min
(b)
820 m =
40100 m = 0.4 m
7 m + 0.4 m = 7.4 m
(c)
1 km = 1000 m
4 km = 4000 m
15 km =
15 x 1000 = 200 m
4
15 km
= 4000 + 200
= 4200 m
(d)
1 kg = 1000 g
6 kg = 6000 g
25 kg =
25 x 1000 = 400 g
6
25 kg
= 6000 + 400
= 6400 g
Answer(s): 150, 7.4, 4200, 6400