7th Grade Math Lesson
Subtracting Integers on a Number Line
Shared by A STEM Educator
7th GradeBTC Style / Thinking Classrooms50 min
Learning Objective
Students will subtract positive integers from any integer (positive, negative, or zero) using a number line model, interpreting subtraction as movement to the left.
Lesson Overview
Students progress from subtracting small positive integers on a number line to subtracting larger integers with negative results, building fluency with the 'move left' interpretation of subtraction.
Materials
- Whiteboard and dry-erase markers (vertical surfaces)
- Pencil and paper
Scaffolded Task Progression
1Task 1
Use the number line below to find . Start at , then show your jump. Where do you land?
[ Interactive graph / diagram, available in the full lesson ]
[ Interactive graph / diagram, available in the full lesson ]
2Task 2
Use the number line to find . Start at , jump left . Where do you land?
[ Interactive graph / diagram, available in the full lesson ]
[ Interactive graph / diagram, available in the full lesson ]
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