Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 5 km 68 m = ______ cm
- 7 km 7 m = ______ m
- 4 km 763 m = _______ m
- 3 km 9 m 4 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
5 km 68 m
= 5 x 100000 + 68 x 100
= 500000 + 6800
= 506800 cm
(b)
1 km = 1000 m
7 km 7 m
= 7 x 1000 + 7
= 7000 + 7
= 7007 m
(c)
1 km = 1000 m
4 km 763 m
= 4 x 1000 + 763
= 4000 + 763
= 4763 m
(d)
1 km = 100000 cm
1 m = 100 cm
3 km 9 m 4 cm
= 3 x 100000 + 9 x 100 + 4
= 300000 + 900 + 4
= 300904 cm
Answer(s): 506800, 7007, 4763, 300904