Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 9 km 64 m = ______ cm
- 8 km 5 m = ______ m
- 7 km 684 m = _______ m
- 8 km 8 m 4 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
9 km 64 m
= 9 x 100000 + 64 x 100
= 900000 + 6400
= 906400 cm
(b)
1 km = 1000 m
8 km 5 m
= 8 x 1000 + 5
= 8000 + 5
= 8005 m
(c)
1 km = 1000 m
7 km 684 m
= 7 x 1000 + 684
= 7000 + 684
= 7684 m
(d)
1 km = 100000 cm
1 m = 100 cm
8 km 8 m 4 cm
= 8 x 100000 + 8 x 100 + 4
= 800000 + 800 + 4
= 800804 cm
Answer(s): 906400, 8005, 7684, 800804