Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 1 23 h = _____ min
- 5 320 m = _____ m (Give the answer in decimal.)
- 5 15 km = _____ m
- 7 12 kg = _____ g
(a)
1 h = 60 min
23 h =
23 x 60 = 40 min
1
23 h = 60 + 40 = 100 min
(b)
320 m =
15100 m = 0.15 m
5 m + 0.15 m = 5.15 m
(c)
1 km = 1000 m
5 km = 5000 m
15 km =
15 x 1000 = 200 m
5
15 km
= 5000 + 200
= 5200 m
(d)
1 kg = 1000 g
7 kg = 7000 g
12 kg =
12 x 1000 = 500 g
7
12 kg
= 7000 + 500
= 7500 g
Answer(s): 100, 5.15, 5200, 7500