Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 8 km 81 m = ______ cm
- 4 km 3 m = ______ m
- 5 km 938 m = _______ m
- 6 km 3 m 4 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
8 km 81 m
= 8 x 100000 + 81 x 100
= 800000 + 8100
= 808100 cm
(b)
1 km = 1000 m
4 km 3 m
= 4 x 1000 + 3
= 4000 + 3
= 4003 m
(c)
1 km = 1000 m
5 km 938 m
= 5 x 1000 + 938
= 5000 + 938
= 5938 m
(d)
1 km = 100000 cm
1 m = 100 cm
6 km 3 m 4 cm
= 6 x 100000 + 3 x 100 + 4
= 600000 + 300 + 4
= 600304 cm
Answer(s): 808100, 4003, 5938, 600304