Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 2 23 h = _____ min
- 7 520 m = _____ m (Give the answer in decimal.)
- 7 12 km = _____ m
- 9 15 kg = _____ g
(a)
1 h = 60 min
23 h =
23 x 60 = 40 min
2
23 h = 120 + 40 = 160 min
(b)
520 m =
25100 m = 0.25 m
7 m + 0.25 m = 7.25 m
(c)
1 km = 1000 m
7 km = 7000 m
12 km =
12 x 1000 = 500 m
7
12 km
= 7000 + 500
= 7500 m
(d)
1 kg = 1000 g
9 kg = 9000 g
15 kg =
15 x 1000 = 200 g
9
15 kg
= 9000 + 200
= 9200 g
Answer(s): 160, 7.25, 7500, 9200