Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 3 km 44 m = ______ cm
- 5 km 5 m = ______ m
- 7 km 863 m = _______ m
- 7 km 2 m 5 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
3 km 44 m
= 3 x 100000 + 44 x 100
= 300000 + 4400
= 304400 cm
(b)
1 km = 1000 m
5 km 5 m
= 5 x 1000 + 5
= 5000 + 5
= 5005 m
(c)
1 km = 1000 m
7 km 863 m
= 7 x 1000 + 863
= 7000 + 863
= 7863 m
(d)
1 km = 100000 cm
1 m = 100 cm
7 km 2 m 5 cm
= 7 x 100000 + 2 x 100 + 5
= 700000 + 200 + 5
= 700205 cm
Answer(s): 304400, 5005, 7863, 700205