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Addition and Subtraction

Year 3 Expectations:

  • Understand and use take away and difference for subtraction, deciding on the most efficient method for the numbers involved, irrespective of context.
  • Recall/use addition/subtraction facts for 100 (multiples of 5 and 10).
  • Derive and use addition and subtraction facts for 100.
  • Derive and use addition and subtraction facts for multiples of 100 totalling 1000.
  • 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.
  • Choose an appropriate strategy to solve a calculation based upon the numbers involved (recall a known fact, calculate mentally, use a jotting, written method).

 

 

 

Year 4 Expectations:

  • Recall and use addition and subtraction facts for 100.
  • Recall and use +/- facts for multiples of 100 totalling 1000.
  • Derive and use addition and subtraction facts for 1 and 10 (with decimal numbers to one decimal place).
  • Add and subtract mentally combinations of two and three digit numbers and decimals to one decimal place.
  • Add and subtract numbers with up to 4 digits and decimals with one decimal place using the formal written methods of columnar addition and subtraction where appropriate.
  • Estimate; use inverse operations to check answers to a calculation.
  • Solve addition and subtraction two-step problems in contexts, deciding which operations and methods to use and why.
  • Solve addition and subtraction problems involving missing numbers.
  • Choose an appropriate strategy to solve a calculation based upon the numbers involved (recall a known fact, calculate mentally, use a jotting, written method).

 

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