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Unit Overview: Extending calculation strategies and additive reasoning

Lessons:

30 lessons

Comparing Strategies

In today's lesson, we will learn to compare strategies around subtraction. We will discuss how efficient some strategies are, such as shifting to preserve the 'same difference' and make calculations easier. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

  • 23m Video
  • Transcript