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Students develop facility with number facts and computation with progressively larger numbers in addition and subtraction and an appreciation of the relationship between those facts.


Early Stage One


NES1.2: Combines, separates and compares collections of objects, describes using everyday language and records using informal methods.

Key ideas:

Stage One


NS1.2: Uses a range of mental strategies and informal recording methods for addition and subtraction involving one and two digit numbers.

Key ideas:

Stage Two


NS2.2: Uses mental and written strategies for addition and subtraction involving two, three and four digit numbers.

Key ideas:
  • Use a range of mental strategies for addition and subtraction involving two-, three- and four-digit numbers
  • Explain and record methods for adding and subtracting
  • Use a formal written algorithm for addition and subtraction

Stage Three


NS3.2: Selects and applies appropriate strategies for addition and subtraction with counting numbers of any size.

Key ideas:
  • Select and apply appropriate mental, written or calculator strategies for addition and subtraction with counting numbers of any size