Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 4 km 58 m = ______ cm
- 4 km 8 m = ______ m
- 6 km 986 m = _______ m
- 9 km 9 m 6 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
4 km 58 m
= 4 x 100000 + 58 x 100
= 400000 + 5800
= 405800 cm
(b)
1 km = 1000 m
4 km 8 m
= 4 x 1000 + 8
= 4000 + 8
= 4008 m
(c)
1 km = 1000 m
6 km 986 m
= 6 x 1000 + 986
= 6000 + 986
= 6986 m
(d)
1 km = 100000 cm
1 m = 100 cm
9 km 9 m 6 cm
= 9 x 100000 + 9 x 100 + 6
= 900000 + 900 + 6
= 900906 cm
Answer(s): 405800, 4008, 6986, 900906