Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 5 km 85 m = ______ cm
- 7 km 6 m = ______ m
- 3 km 744 m = _______ m
- 8 km 9 m 5 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
5 km 85 m
= 5 x 100000 + 85 x 100
= 500000 + 8500
= 508500 cm
(b)
1 km = 1000 m
7 km 6 m
= 7 x 1000 + 6
= 7000 + 6
= 7006 m
(c)
1 km = 1000 m
3 km 744 m
= 3 x 1000 + 744
= 3000 + 744
= 3744 m
(d)
1 km = 100000 cm
1 m = 100 cm
8 km 9 m 5 cm
= 8 x 100000 + 9 x 100 + 5
= 800000 + 900 + 5
= 800905 cm
Answer(s): 508500, 7006, 3744, 800905