Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 8 km 86 m = ______ cm
- 3 km 9 m = ______ m
- 9 km 278 m = _______ m
- 2 km 8 m 6 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
8 km 86 m
= 8 x 100000 + 86 x 100
= 800000 + 8600
= 808600 cm
(b)
1 km = 1000 m
3 km 9 m
= 3 x 1000 + 9
= 3000 + 9
= 3009 m
(c)
1 km = 1000 m
9 km 278 m
= 9 x 1000 + 278
= 9000 + 278
= 9278 m
(d)
1 km = 100000 cm
1 m = 100 cm
2 km 8 m 6 cm
= 2 x 100000 + 8 x 100 + 6
= 200000 + 800 + 6
= 200806 cm
Answer(s): 808600, 3009, 9278, 200806