Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 6 km 57 m = ______ cm
- 7 km 7 m = ______ m
- 3 km 180 m = _______ m
- 4 km 8 m 3 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
6 km 57 m
= 6 x 100000 + 57 x 100
= 600000 + 5700
= 605700 cm
(b)
1 km = 1000 m
7 km 7 m
= 7 x 1000 + 7
= 7000 + 7
= 7007 m
(c)
1 km = 1000 m
3 km 180 m
= 3 x 1000 + 180
= 3000 + 180
= 3180 m
(d)
1 km = 100000 cm
1 m = 100 cm
4 km 8 m 3 cm
= 4 x 100000 + 8 x 100 + 3
= 400000 + 800 + 3
= 400803 cm
Answer(s): 605700, 7007, 3180, 400803