Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 2 km 61 m = ______ cm
- 4 km 5 m = ______ m
- 7 km 539 m = _______ m
- 5 km 2 m 2 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
2 km 61 m
= 2 x 100000 + 61 x 100
= 200000 + 6100
= 206100 cm
(b)
1 km = 1000 m
4 km 5 m
= 4 x 1000 + 5
= 4000 + 5
= 4005 m
(c)
1 km = 1000 m
7 km 539 m
= 7 x 1000 + 539
= 7000 + 539
= 7539 m
(d)
1 km = 100000 cm
1 m = 100 cm
5 km 2 m 2 cm
= 5 x 100000 + 2 x 100 + 2
= 500000 + 200 + 2
= 500202 cm
Answer(s): 206100, 4005, 7539, 500202