Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 km 65 m = ______ cm
- 2 km 9 m = ______ m
- 4 km 161 m = _______ m
- 3 km 3 m 3 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
7 km 65 m
= 7 x 100000 + 65 x 100
= 700000 + 6500
= 706500 cm
(b)
1 km = 1000 m
2 km 9 m
= 2 x 1000 + 9
= 2000 + 9
= 2009 m
(c)
1 km = 1000 m
4 km 161 m
= 4 x 1000 + 161
= 4000 + 161
= 4161 m
(d)
1 km = 100000 cm
1 m = 100 cm
3 km 3 m 3 cm
= 3 x 100000 + 3 x 100 + 3
= 300000 + 300 + 3
= 300303 cm
Answer(s): 706500, 2009, 4161, 300303