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Lesson objective: Solve problems using the number line to show addition and subtraction strategies.
This lesson provides an opportunity for students to apply their knowledge and understanding of addition and subtraction to a real-life situation. Students are asked to show on the number line a correct strategy for solving the problem.
Key Concept students will use:
representations and drawings to solve one-step situational problems involving addition and subtraction of mass.
Skills students will use:
Students engage in Mathematical Practice 1 (make sense of problems and persevere in solving them) as they use the number line to understand the problem and the meaning of the question. Students engage in Mathematical Practice 4 (model with mathematics) as they write number equations to describe how they used the number line.
Key vocabulary:
Special materials needed: