Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 3 km 25 m = ______ cm
- 3 km 8 m = ______ m
- 8 km 644 m = _______ m
- 6 km 2 m 8 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
3 km 25 m
= 3 x 100000 + 25 x 100
= 300000 + 2500
= 302500 cm
(b)
1 km = 1000 m
3 km 8 m
= 3 x 1000 + 8
= 3000 + 8
= 3008 m
(c)
1 km = 1000 m
8 km 644 m
= 8 x 1000 + 644
= 8000 + 644
= 8644 m
(d)
1 km = 100000 cm
1 m = 100 cm
6 km 2 m 8 cm
= 6 x 100000 + 2 x 100 + 8
= 600000 + 200 + 8
= 600208 cm
Answer(s): 302500, 3008, 8644, 600208