Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 3 km 95 m = ______ cm
- 7 km 2 m = ______ m
- 4 km 857 m = _______ m
- 7 km 4 m 5 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
3 km 95 m
= 3 x 100000 + 95 x 100
= 300000 + 9500
= 309500 cm
(b)
1 km = 1000 m
7 km 2 m
= 7 x 1000 + 2
= 7000 + 2
= 7002 m
(c)
1 km = 1000 m
4 km 857 m
= 4 x 1000 + 857
= 4000 + 857
= 4857 m
(d)
1 km = 100000 cm
1 m = 100 cm
7 km 4 m 5 cm
= 7 x 100000 + 4 x 100 + 5
= 700000 + 400 + 5
= 700405 cm
Answer(s): 309500, 7002, 4857, 700405