Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 6 km 50 m = ______ cm
- 7 km 9 m = ______ m
- 9 km 210 m = _______ m
- 4 km 2 m 9 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
6 km 50 m
= 6 x 100000 + 50 x 100
= 600000 + 5000
= 605000 cm
(b)
1 km = 1000 m
7 km 9 m
= 7 x 1000 + 9
= 7000 + 9
= 7009 m
(c)
1 km = 1000 m
9 km 210 m
= 9 x 1000 + 210
= 9000 + 210
= 9210 m
(d)
1 km = 100000 cm
1 m = 100 cm
4 km 2 m 9 cm
= 4 x 100000 + 2 x 100 + 9
= 400000 + 200 + 9
= 400209 cm
Answer(s): 605000, 7009, 9210, 400209