Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 2 12 h = _____ min
- 7 810 m = _____ m (Give the answer in decimal.)
- 9 12 km = _____ m
- 5 45 kg = _____ g
(a)
1 h = 60 min
12 h =
12 x 60 = 30 min
2
12 h = 120 + 30 = 150 min
(b)
810 m =
80100 m = 0.8 m
7 m + 0.8 m = 7.8 m
(c)
1 km = 1000 m
9 km = 9000 m
12 km =
12 x 1000 = 500 m
9
12 km
= 9000 + 500
= 9500 m
(d)
1 kg = 1000 g
5 kg = 5000 g
45 kg =
45 x 1000 = 800 g
5
45 kg
= 5000 + 800
= 5800 g
Answer(s): 150, 7.8, 9500, 5800