Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 6 km 81 m = ______ cm
- 9 km 4 m = ______ m
- 7 km 139 m = _______ m
- 5 km 5 m 6 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
6 km 81 m
= 6 x 100000 + 81 x 100
= 600000 + 8100
= 608100 cm
(b)
1 km = 1000 m
9 km 4 m
= 9 x 1000 + 4
= 9000 + 4
= 9004 m
(c)
1 km = 1000 m
7 km 139 m
= 7 x 1000 + 139
= 7000 + 139
= 7139 m
(d)
1 km = 100000 cm
1 m = 100 cm
5 km 5 m 6 cm
= 5 x 100000 + 5 x 100 + 6
= 500000 + 500 + 6
= 500506 cm
Answer(s): 608100, 9004, 7139, 500506