Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 3 km 89 m = ______ cm
- 6 km 5 m = ______ m
- 2 km 475 m = _______ m
- 2 km 6 m 9 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
3 km 89 m
= 3 x 100000 + 89 x 100
= 300000 + 8900
= 308900 cm
(b)
1 km = 1000 m
6 km 5 m
= 6 x 1000 + 5
= 6000 + 5
= 6005 m
(c)
1 km = 1000 m
2 km 475 m
= 2 x 1000 + 475
= 2000 + 475
= 2475 m
(d)
1 km = 100000 cm
1 m = 100 cm
2 km 6 m 9 cm
= 2 x 100000 + 6 x 100 + 9
= 200000 + 600 + 9
= 200609 cm
Answer(s): 308900, 6005, 2475, 200609