Answer:
Step-by-step explanation:
To measure something accurately you should use standard units
You should use different units for different lengths:
millimetres (mm) are good for very small lengths - like the width of a pencil or your finger
centimetres (cm) are good for something a bit longer - like the length of a pencil or a book
metres (m) are good for something even longer - like the width of a room or the length of building
kilometres (km) are good for longer distances - like the distance between home and school, or between different towns
You should use proper instruments to measure accurately, like a ruler, tape measure, metre stick or trundle wheel.
