Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 8 km 81 m = ______ cm
- 3 km 7 m = ______ m
- 3 km 602 m = _______ m
- 4 km 3 m 8 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
8 km 81 m
= 8 x 100000 + 81 x 100
= 800000 + 8100
= 808100 cm
(b)
1 km = 1000 m
3 km 7 m
= 3 x 1000 + 7
= 3000 + 7
= 3007 m
(c)
1 km = 1000 m
3 km 602 m
= 3 x 1000 + 602
= 3000 + 602
= 3602 m
(d)
1 km = 100000 cm
1 m = 100 cm
4 km 3 m 8 cm
= 4 x 100000 + 3 x 100 + 8
= 400000 + 300 + 8
= 400308 cm
Answer(s): 808100, 3007, 3602, 400308