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Addition and Subtraction

Pupils should be taught to:

  • add and subtract numbers mentally, including:

     a three-digit number and ones

     a three-digit number and tens

     a three-digit number and hundreds

  • add and subtract numbers with up to three digits, using formal written methods of columnar addition and subtraction
  • estimate the answer to a calculation and use inverse operations to check answers
  • solve problems, including missing number problems, using number facts, place value, and more complex addition and subtraction.