What units are used for large and small lengths?
- Units are ways we measure how long something is.
- For small lengths, we often use millimetres (mm) and centimetres (cm).
- For big lengths, we like to use metres (m) and kilometres (km).
Examples:
- Measuring a pencil:
- A pencil could be about 15 cm long.
- This is a small size, so we use centimetres!
- Measuring a classroom:
- A classroom might be about 10 m long.
- This is bigger, so we use metres!
- Measuring a park:
- A big park can be 1 km long or even longer.
- For such a long distance, we use kilometres!
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