Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 5 km 76 m = ______ cm
- 3 km 7 m = ______ m
- 2 km 749 m = _______ m
- 4 km 4 m 3 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
5 km 76 m
= 5 x 100000 + 76 x 100
= 500000 + 7600
= 507600 cm
(b)
1 km = 1000 m
3 km 7 m
= 3 x 1000 + 7
= 3000 + 7
= 3007 m
(c)
1 km = 1000 m
2 km 749 m
= 2 x 1000 + 749
= 2000 + 749
= 2749 m
(d)
1 km = 100000 cm
1 m = 100 cm
4 km 4 m 3 cm
= 4 x 100000 + 4 x 100 + 3
= 400000 + 400 + 3
= 400403 cm
Answer(s): 507600, 3007, 2749, 400403