Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 5 km 72 m = ______ cm
- 5 km 8 m = ______ m
- 2 km 809 m = _______ m
- 3 km 4 m 3 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
5 km 72 m
= 5 x 100000 + 72 x 100
= 500000 + 7200
= 507200 cm
(b)
1 km = 1000 m
5 km 8 m
= 5 x 1000 + 8
= 5000 + 8
= 5008 m
(c)
1 km = 1000 m
2 km 809 m
= 2 x 1000 + 809
= 2000 + 809
= 2809 m
(d)
1 km = 100000 cm
1 m = 100 cm
3 km 4 m 3 cm
= 3 x 100000 + 4 x 100 + 3
= 300000 + 400 + 3
= 300403 cm
Answer(s): 507200, 5008, 2809, 300403