Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 1 12 h = _____ min
- 5 25 m = _____ m (Give the answer in decimal.)
- 2 12 km = _____ m
- 6 18 kg = _____ g
(a)
1 h = 60 min
12 h =
12 x 60 = 30 min
1
12 h = 60 + 30 = 90 min
(b)
25 m =
40100 m = 0.4 m
5 m + 0.4 m = 5.4 m
(c)
1 km = 1000 m
2 km = 2000 m
12 km =
12 x 1000 = 500 m
2
12 km
= 2000 + 500
= 2500 m
(d)
1 kg = 1000 g
6 kg = 6000 g
18 kg =
18 x 1000 = 125 g
6
18 kg
= 6000 + 125
= 6125 g
Answer(s): 90, 5.4, 2500, 6125