Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 km 62 m = ______ cm
- 2 km 3 m = ______ m
- 8 km 655 m = _______ m
- 8 km 3 m 9 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
7 km 62 m
= 7 x 100000 + 62 x 100
= 700000 + 6200
= 706200 cm
(b)
1 km = 1000 m
2 km 3 m
= 2 x 1000 + 3
= 2000 + 3
= 2003 m
(c)
1 km = 1000 m
8 km 655 m
= 8 x 1000 + 655
= 8000 + 655
= 8655 m
(d)
1 km = 100000 cm
1 m = 100 cm
8 km 3 m 9 cm
= 8 x 100000 + 3 x 100 + 9
= 800000 + 300 + 9
= 800309 cm
Answer(s): 706200, 2003, 8655, 800309