Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 km 50 m = ______ cm
- 5 km 5 m = ______ m
- 5 km 231 m = _______ m
- 4 km 2 m 4 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
7 km 50 m
= 7 x 100000 + 50 x 100
= 700000 + 5000
= 705000 cm
(b)
1 km = 1000 m
5 km 5 m
= 5 x 1000 + 5
= 5000 + 5
= 5005 m
(c)
1 km = 1000 m
5 km 231 m
= 5 x 1000 + 231
= 5000 + 231
= 5231 m
(d)
1 km = 100000 cm
1 m = 100 cm
4 km 2 m 4 cm
= 4 x 100000 + 2 x 100 + 4
= 400000 + 200 + 4
= 400204 cm
Answer(s): 705000, 5005, 5231, 400204