Operations and Algebraic Thinking · Algebraic Thinking

Addition and Subtraction Strategies

Moving from counting on fingers to using derived facts like doubles and making ten.

Key Questions

  1. 1How can knowing that 5 plus 5 equals 10 help you solve 5 plus 6?
  2. 2Why can we solve a subtraction problem by thinking about addition?
  3. 3Which strategy is most efficient for adding a small number to a large number?

Ontario Curriculum Expectations

ON: Number - Grade 1ON: Algebra - Grade 1
Grade: Grade 1
Subject: Mathematics
Unit: Operations and Algebraic Thinking
Period: Algebraic Thinking

Suggested Methodologies

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