Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 8 km 94 m = ______ cm
- 7 km 9 m = ______ m
- 2 km 521 m = _______ m
- 9 km 2 m 3 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
8 km 94 m
= 8 x 100000 + 94 x 100
= 800000 + 9400
= 809400 cm
(b)
1 km = 1000 m
7 km 9 m
= 7 x 1000 + 9
= 7000 + 9
= 7009 m
(c)
1 km = 1000 m
2 km 521 m
= 2 x 1000 + 521
= 2000 + 521
= 2521 m
(d)
1 km = 100000 cm
1 m = 100 cm
9 km 2 m 3 cm
= 9 x 100000 + 2 x 100 + 3
= 900000 + 200 + 3
= 900203 cm
Answer(s): 809400, 7009, 2521, 900203