Diagrams with All Kinds of Compare Problems
In this lesson, students continue to make sense of tape diagrams as they connect them to story problems. The story problems in this lesson include Compare problems with an unknown difference, an unknown larger number, or an unknown smaller number. Because these problem types are familiar from grade 1, students also begin to work with numbers within 100 in this lesson. This gives students an opportunity to notice how the tape diagram can be used to quickly visualize story problems with larger quantities. Students use tape diagrams to make sense of Compare problems. When students connect situations, tape diagrams, and equations, they deepen their understanding of the problem type and develop strategies they can use to make sense of and persevere in solving these problems in future lessons (MP1, MP2).
- Action and Expression
- Interpret tape diagrams that represent Compare problems, with unknowns in all positions within 100.
- Let’s connect Compare problems to diagrams.
Materials to Copy
- Card Sort: At the Beach
- Create a set of cards from the blackline master for each group of 2.
|Activity 1||15 min|
|Activity 2||20 min|
|Lesson Synthesis||10 min|
Teacher Reflection Questions
- Number Puzzles: Addition and Subtraction (1–4), Stage 2: Within 20 (Addressing)
- Shake and Spill (K–2), Stage 5: Cover (up to 20) (Supporting)
- Sort and Display (1–3), Stage 2: Picture or Bar Graphs (Addressing)
Print Formatted Materials
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|Student Task Statements||docx|
|Lesson Cover Page||docx|
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|Teacher Guide||Log In|
|Teacher Presentation Materials||docx|