Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 km 47 m = ______ cm
- 7 km 5 m = ______ m
- 7 km 370 m = _______ m
- 6 km 5 m 3 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
7 km 47 m
= 7 x 100000 + 47 x 100
= 700000 + 4700
= 704700 cm
(b)
1 km = 1000 m
7 km 5 m
= 7 x 1000 + 5
= 7000 + 5
= 7005 m
(c)
1 km = 1000 m
7 km 370 m
= 7 x 1000 + 370
= 7000 + 370
= 7370 m
(d)
1 km = 100000 cm
1 m = 100 cm
6 km 5 m 3 cm
= 6 x 100000 + 5 x 100 + 3
= 600000 + 500 + 3
= 600503 cm
Answer(s): 704700, 7005, 7370, 600503