Addition and Subtraction Mastery · Number and Operations

The Logic of Regrouping

Moving beyond counting on to using place value exchange in addition and subtraction.

Key Questions

  1. 1Why do we need to rename ten ones as one ten during addition?
  2. 2What happens to a hundred when we need to subtract more tens than are currently available?
  3. 3How can we use addition to prove that our subtraction answer is correct?

MOE Syllabus Outcomes

MOE: Numbers and Algebra - P2MOE: Addition and Subtraction - P2
Level: Primary 2
Subject: Mathematics
Unit: Addition and Subtraction Mastery
Period: Number and Operations

Suggested Methodologies

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