Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 2 km 54 m = ______ cm
- 8 km 4 m = ______ m
- 3 km 794 m = _______ m
- 8 km 3 m 5 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
2 km 54 m
= 2 x 100000 + 54 x 100
= 200000 + 5400
= 205400 cm
(b)
1 km = 1000 m
8 km 4 m
= 8 x 1000 + 4
= 8000 + 4
= 8004 m
(c)
1 km = 1000 m
3 km 794 m
= 3 x 1000 + 794
= 3000 + 794
= 3794 m
(d)
1 km = 100000 cm
1 m = 100 cm
8 km 3 m 5 cm
= 8 x 100000 + 3 x 100 + 5
= 800000 + 300 + 5
= 800305 cm
Answer(s): 205400, 8004, 3794, 800305