Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 3 km 97 m = ______ cm
- 8 km 4 m = ______ m
- 2 km 299 m = _______ m
- 2 km 7 m 8 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
3 km 97 m
= 3 x 100000 + 97 x 100
= 300000 + 9700
= 309700 cm
(b)
1 km = 1000 m
8 km 4 m
= 8 x 1000 + 4
= 8000 + 4
= 8004 m
(c)
1 km = 1000 m
2 km 299 m
= 2 x 1000 + 299
= 2000 + 299
= 2299 m
(d)
1 km = 100000 cm
1 m = 100 cm
2 km 7 m 8 cm
= 2 x 100000 + 7 x 100 + 8
= 200000 + 700 + 8
= 200708 cm
Answer(s): 309700, 8004, 2299, 200708