Estimating Sums and Differences
Solving one-step and two-step linear equations involving a single variable using inverse operations.
Key Questions
- What does it mean to estimate an answer before you calculate?
- How can rounding to the nearest ten help you estimate a sum or difference?
- Can you check whether a calculated answer is reasonable by comparing it to your estimate?
NCCA Curriculum Specifications
Suggested Methodologies
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Planning templates for Mathematical Explorers: Building Foundations
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.
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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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