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Reciprocals

Maths: KS3, topic 1.4.5

Reciprocals

To find the reciprocal of a number xx, you must calculate 1x\dfrac{1}{x}

Example 1

Example 1

  • Find the reciprocal of 2
  • Use the fact that the reciprocal is 1x\dfrac{1}{x} and substitute x=2x = 2
Example 2

Example 2

  • Find the reciprocal of 14\dfrac{1}{4}
  • Use the fact that the reciprocal is 1x\dfrac{1}{x} and substitute x=14x = \dfrac{1}{4}
Example 3

Example 3

  • Find the reciprocal of 25\dfrac{2}{5}
  • Use the fact that the reciprocal is 1x\dfrac{1}{x} and substitute x=25x = \dfrac{2}{5}

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