Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 km 96 m = ______ cm
- 6 km 7 m = ______ m
- 9 km 490 m = _______ m
- 9 km 7 m 8 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
7 km 96 m
= 7 x 100000 + 96 x 100
= 700000 + 9600
= 709600 cm
(b)
1 km = 1000 m
6 km 7 m
= 6 x 1000 + 7
= 6000 + 7
= 6007 m
(c)
1 km = 1000 m
9 km 490 m
= 9 x 1000 + 490
= 9000 + 490
= 9490 m
(d)
1 km = 100000 cm
1 m = 100 cm
9 km 7 m 8 cm
= 9 x 100000 + 7 x 100 + 8
= 900000 + 700 + 8
= 900708 cm
Answer(s): 709600, 6007, 9490, 900708