Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 6 km 90 m = ______ cm
- 7 km 4 m = ______ m
- 6 km 661 m = _______ m
- 5 km 4 m 9 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
6 km 90 m
= 6 x 100000 + 90 x 100
= 600000 + 9000
= 609000 cm
(b)
1 km = 1000 m
7 km 4 m
= 7 x 1000 + 4
= 7000 + 4
= 7004 m
(c)
1 km = 1000 m
6 km 661 m
= 6 x 1000 + 661
= 6000 + 661
= 6661 m
(d)
1 km = 100000 cm
1 m = 100 cm
5 km 4 m 9 cm
= 5 x 100000 + 4 x 100 + 9
= 500000 + 400 + 9
= 500409 cm
Answer(s): 609000, 7004, 6661, 500409