Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 1 13 h = _____ min
- 2 510 m = _____ m (Give the answer in decimal.)
- 3 15 km = _____ m
- 9 12 kg = _____ g
(a)
1 h = 60 min
13 h =
13 x 60 = 20 min
1
13 h = 60 + 20 = 80 min
(b)
510 m =
50100 m = 0.5 m
2 m + 0.5 m = 2.5 m
(c)
1 km = 1000 m
3 km = 3000 m
15 km =
15 x 1000 = 200 m
3
15 km
= 3000 + 200
= 3200 m
(d)
1 kg = 1000 g
9 kg = 9000 g
12 kg =
12 x 1000 = 500 g
9
12 kg
= 9000 + 500
= 9500 g
Answer(s): 80, 2.5, 3200, 9500