Children need to be able to use the basic metric units in order to measure the length, weight and volume, or capacity, of items around them. They need to know which unit of measure best suits the problem given, and be able to convert from one unit of measure to another.

The basic facts which they need to learn in relation to measure are as follows:

__Length__

There are 10 mm (millimetres) in 1 cm (centimetre)

There are 100 cm in 1 m (metre)

There are 1000 m in 1 km (kilometre)

__Weight__

There are 1000 g (grams) in 1 kg (kilogram)

__Volume / Capacity__

There are 1000 ml (millilitres) in 1 L (Litre)

Things to measure and weigh are all around us and children have lots of opportunities to practise with measuring around the home, either measuring the lengths of things with rulers; the weight of things on scales or the volume or capacity of items with measuring jugs.

This practise will enable them to undestand that you would measure the length of a stamp in mm; the length of a piece of A4 paper in cm; the length of a room in metres and the distance between towns in kilometres.

Also that sugar would be measured in grams, but a bag of potatoes would be measured in kilograms etc.

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