Subtracting Two-Digit Numbers (No Regrouping)
Students will subtract two-digit numbers using strategies based on place value, without regrouping.
Key Questions
- Explain how subtracting tens and ones separately helps solve a subtraction problem.
- Design a number line strategy to solve 58 - 23.
- Compare subtracting with base ten blocks to subtracting using expanded form.
Ontario Curriculum Expectations
Suggested Methodologies
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Planning templates for Mathematics
5E Model
The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.
unit plannerMath Unit
Plan a multi-week math unit with conceptual coherence: from building number sense and procedural fluency to applying skills in context and developing mathematical reasoning across a connected sequence of lessons.
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Build a math rubric that assesses problem-solving, mathematical reasoning, and communication alongside procedural accuracy, giving students feedback on how they think, not just whether they got the right answer.
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