Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 3 12 h = _____ min
- 3 720 m = _____ m (Give the answer in decimal.)
- 2 12 km = _____ m
- 4 78 kg = _____ g
(a)
1 h = 60 min
12 h =
12 x 60 = 30 min
3
12 h = 180 + 30 = 210 min
(b)
720 m =
35100 m = 0.35 m
3 m + 0.35 m = 3.35 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
4 kg = 4000 g
78 kg =
78 x 1000 = 875 g
4
78 kg
= 4000 + 875
= 4875 g
Answer(s): 210, 3.35, 2500, 4875