Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 8 km 68 m = ______ cm
- 3 km 2 m = ______ m
- 2 km 499 m = _______ m
- 9 km 4 m 3 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
8 km 68 m
= 8 x 100000 + 68 x 100
= 800000 + 6800
= 806800 cm
(b)
1 km = 1000 m
3 km 2 m
= 3 x 1000 + 2
= 3000 + 2
= 3002 m
(c)
1 km = 1000 m
2 km 499 m
= 2 x 1000 + 499
= 2000 + 499
= 2499 m
(d)
1 km = 100000 cm
1 m = 100 cm
9 km 4 m 3 cm
= 9 x 100000 + 4 x 100 + 3
= 900000 + 400 + 3
= 900403 cm
Answer(s): 806800, 3002, 2499, 900403