Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 km 69 m = ______ cm
- 8 km 7 m = ______ m
- 9 km 698 m = _______ m
- 2 km 8 m 3 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
7 km 69 m
= 7 x 100000 + 69 x 100
= 700000 + 6900
= 706900 cm
(b)
1 km = 1000 m
8 km 7 m
= 8 x 1000 + 7
= 8000 + 7
= 8007 m
(c)
1 km = 1000 m
9 km 698 m
= 9 x 1000 + 698
= 9000 + 698
= 9698 m
(d)
1 km = 100000 cm
1 m = 100 cm
2 km 8 m 3 cm
= 2 x 100000 + 8 x 100 + 3
= 200000 + 800 + 3
= 200803 cm
Answer(s): 706900, 8007, 9698, 200803