Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 9 km 87 m = ______ cm
- 4 km 7 m = ______ m
- 9 km 812 m = _______ m
- 8 km 5 m 7 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
9 km 87 m
= 9 x 100000 + 87 x 100
= 900000 + 8700
= 908700 cm
(b)
1 km = 1000 m
4 km 7 m
= 4 x 1000 + 7
= 4000 + 7
= 4007 m
(c)
1 km = 1000 m
9 km 812 m
= 9 x 1000 + 812
= 9000 + 812
= 9812 m
(d)
1 km = 100000 cm
1 m = 100 cm
8 km 5 m 7 cm
= 8 x 100000 + 5 x 100 + 7
= 800000 + 500 + 7
= 800507 cm
Answer(s): 908700, 4007, 9812, 800507