Length

Ages 610

Difficulty adapts to you

Length

Length tells us how long something is. We measure it in millimetres (mm), centimetres (cm), metres (m), and kilometres (km).

Your goals

  • You can measure and compare lengths.
  • You can use length, unit correctly.
  • You can start at zero on the measuring tool and include the unit.

Words to know

length:
The distance from one end of an object to the other.
unit:
An agreed amount used for measuring.

Examples

  • 1A pencil is about 15 cm long.
  • 21 m = 100 cm. The classroom might be 8 m long.

Check these

  • Do not choose a unit that is much too large or too small.
  • Keep every number, symbol, label, and unit in its correct place.
  • Show enough working to check how you reached your answer.

Helpful habits

  • Read the whole question before choosing what to do.
  • Show one clear step at a time and check each step.
  • If you are stuck, draw a model, try smaller numbers, or revisit the example.

Now try your own

Create your own length example, solve it, and explain how you checked it.

Spark

Spark

Creativity & Innovation

Maths is like a puzzle — the fun is in figuring it out!