Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 km 30 m = ______ cm
- 7 km 2 m = ______ m
- 4 km 320 m = _______ m
- 5 km 4 m 6 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
7 km 30 m
= 7 x 100000 + 30 x 100
= 700000 + 3000
= 703000 cm
(b)
1 km = 1000 m
7 km 2 m
= 7 x 1000 + 2
= 7000 + 2
= 7002 m
(c)
1 km = 1000 m
4 km 320 m
= 4 x 1000 + 320
= 4000 + 320
= 4320 m
(d)
1 km = 100000 cm
1 m = 100 cm
5 km 4 m 6 cm
= 5 x 100000 + 4 x 100 + 6
= 500000 + 400 + 6
= 500406 cm
Answer(s): 703000, 7002, 4320, 500406