Additive Thinking and Strategy · Addition and Subtraction

The Commutative Property

Discovering why the order of numbers matters in subtraction but not in addition.

Key Questions

  1. 1Why can we swap numbers in an addition sentence but not in a subtraction sentence?
  2. 2How does knowing 7 + 3 help us solve 10 minus 7 without counting?
  3. 3How can we use a part-whole model to show all the facts in a number family?

National Curriculum Attainment Targets

KS1: Mathematics - Addition and Subtraction
Year: Year 2
Subject: Mathematics
Unit: Additive Thinking and Strategy
Period: Addition and Subtraction

Suggested Methodologies

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