Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 km 41 m = ______ cm
- 4 km 3 m = ______ m
- 3 km 746 m = _______ m
- 7 km 5 m 8 cm = _______ cm
(a)
1 km = 100000 cm
1 m = 100 cm
7 km 41 m
= 7 x 100000 + 41 x 100
= 700000 + 4100
= 704100 cm
(b)
1 km = 1000 m
4 km 3 m
= 4 x 1000 + 3
= 4000 + 3
= 4003 m
(c)
1 km = 1000 m
3 km 746 m
= 3 x 1000 + 746
= 3000 + 746
= 3746 m
(d)
1 km = 100000 cm
1 m = 100 cm
7 km 5 m 8 cm
= 7 x 100000 + 5 x 100 + 8
= 700000 + 500 + 8
= 700508 cm
Answer(s): 704100, 4003, 3746, 700508