Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 4 km 78 m = ______ cm
- 5 km 4 m = ______ m
- 4 km 114 m = _______ m
- 4 km 4 m 6 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
4 km 78 m
= 4 x 100000 + 78 x 100
= 400000 + 7800
= 407800 cm
(b)
1 km = 1000 m
5 km 4 m
= 5 x 1000 + 4
= 5000 + 4
= 5004 m
(c)
1 km = 1000 m
4 km 114 m
= 4 x 1000 + 114
= 4000 + 114
= 4114 m
(d)
1 km = 100000 cm
1 m = 100 cm
4 km 4 m 6 cm
= 4 x 100000 + 4 x 100 + 6
= 400000 + 400 + 6
= 400406 cm
Answer(s): 407800, 5004, 4114, 400406