Additive Thinking and Operations · Number and Algebra

Combining and Separating Groups

Using physical materials to model addition as joining and subtraction as taking away.

Key Questions

  1. 1How are addition and subtraction like opposites?
  2. 2If we know 3 plus 2 equals 5, what else do we automatically know?
  3. 3What strategies can we use when a problem asks us to find the difference?

ACARA Content Descriptions

AC9M1N03
Year: Year 1
Subject: Mathematics
Unit: Additive Thinking and Operations
Period: Number and Algebra

Suggested Methodologies

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