Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 3 km 28 m = ______ cm
- 8 km 2 m = ______ m
- 9 km 791 m = _______ m
- 9 km 4 m 7 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
3 km 28 m
= 3 x 100000 + 28 x 100
= 300000 + 2800
= 302800 cm
(b)
1 km = 1000 m
8 km 2 m
= 8 x 1000 + 2
= 8000 + 2
= 8002 m
(c)
1 km = 1000 m
9 km 791 m
= 9 x 1000 + 791
= 9000 + 791
= 9791 m
(d)
1 km = 100000 cm
1 m = 100 cm
9 km 4 m 7 cm
= 9 x 100000 + 4 x 100 + 7
= 900000 + 400 + 7
= 900407 cm
Answer(s): 302800, 8002, 9791, 900407