A kilometre (km) is a unit of measurement used to describe distance, and it is part of the metric system, which is commonly used around the world. One kilometre is equal to 1,000 metres.
In everyday life, kilometres are often used to measure the distance between places, like how far it is from one town to another. For example, if your school is 5 kilometres away from your home, it means it is 5,000 metres away.
Understanding kilometres can help you solve problems in maths, especially in topics related to measurement and conversion, which are important in your GCSE Maths course.
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