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Calculating using knowledge of equivalence in addition and subtraction

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Why this why now

This unit allows pupils to become more familiar with using equivalence, relating to addition and subtraction, to solve problems in a range of contexts. This will support them as they move on into solving problems with two unknowns and into more formal algebra in Year 7.

Prior knowledge requirements

  • Understand inverse relationship between addition and subtraction
  • Rearrange number sentences to find missing values
  • Recognise when to apply compensation or balancing strategies

Threads

Why this why now

This unit allows pupils to become more familiar with using equivalence, relating to addition and subtraction, to solve problems in a range of contexts. This will support them as they move on into solving problems with two unknowns and into more formal algebra in Year 7.

Prior knowledge requirements

  • Understand inverse relationship between addition and subtraction
  • Rearrange number sentences to find missing values
  • Recognise when to apply compensation or balancing strategies