Page 58 - Mathematics_Std_4

Example 3

Convert 7 m into decimetres.

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Solution
Use the relationship between metre and decimetre.

1 m = 10 dm
7 m = 10 × 7 dm
= 70 dm

Therefore, 7 m is equal to 70 dm.

Exercise 1

1. Convert the following measurements:

(a) 17 km into metres

(b) 7 km 500 m into centimetres
(c) 35 cm into millimetres

(d) 7 dam into metres

2. A road is 22 kilometres long. Convert this length to

decimetres.

3. Convert the following measurements:
(a) A farm of length 268 metres into millimetres

(b) A building with a height of 63 dam into metres

(c) A board with a length of 3 metres and 20 centimetres
into millimetres

(d) A tower with a height of 15 hectometres into metres.

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MATHEMATICS STD 4 PB 2024.indd 51 06/11/2024 17:17:08