Using Models for Subtraction within 100
Students use concrete models or drawings and strategies based on place value to subtract within 100, including decomposing a ten.
Key Questions
- Compare the process of decomposing a ten in subtraction to composing a ten in addition.
- Construct a drawing to illustrate how to subtract a two-digit number from another with borrowing.
- Evaluate the benefits of using models before moving to abstract algorithms for subtraction.
Common Core State Standards
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.
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