Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 9 km 58 m = ______ cm
- 8 km 9 m = ______ m
- 8 km 643 m = _______ m
- 8 km 7 m 6 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
9 km 58 m
= 9 x 100000 + 58 x 100
= 900000 + 5800
= 905800 cm
(b)
1 km = 1000 m
8 km 9 m
= 8 x 1000 + 9
= 8000 + 9
= 8009 m
(c)
1 km = 1000 m
8 km 643 m
= 8 x 1000 + 643
= 8000 + 643
= 8643 m
(d)
1 km = 100000 cm
1 m = 100 cm
8 km 7 m 6 cm
= 8 x 100000 + 7 x 100 + 6
= 800000 + 700 + 6
= 800706 cm
Answer(s): 905800, 8009, 8643, 800706