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Watch: What are imperial measures?

Miles, feet and inches are old units of length. These are known as imperial units of length but are not now commonly used in maths.

  • There are 12 inches in a foot.
  • An inch is roughly equal to 2.5 centimetres.
  • A foot is roughly equal to 30 centimetres.
  • A mile is roughly equal to 1.5 kilometres.

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NEW! Play Guardians: Defenders of Mathematica - the winter update
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