Addition and Subtraction Mastery · Number and Operations

Mental Calculation Strategies

Building flexible thinking to solve problems without relying solely on written algorithms.

Key Questions

  1. 1How can breaking a number into smaller parts make it easier to add in your head?
  2. 2When is it more efficient to use a mental strategy rather than a formal vertical method?
  3. 3Why does adding nine feel similar to adding ten and then taking one away?

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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