Subtracting Integers on a Number Line
6-8
1
Adding Integers Using a Number Line
Lesson Details
Grade Level
6-8
Duration (minutes)
1
Summary
This lesson teaches how to add integers using a number line. Using the example -3 + 5, it shows starting at -3 and moving 5 spaces to the right (since adding a positive number means moving right), landing on 2. It closes with the key rule: adding a positive number moves you right on the number line, while adding a negative number moves you left.
Student Worksheet: Adding Integers on a Number Line
Teacher Note: Students can watch the video lesson above and answer the questions. Click the “Teacher Answer Key” dropdown below when you are ready to review the solutions!
Key Concepts:
• Number Line: A tool that shows movement left or right to help add integers.
• Adding a Positive Number: Move to the right on the number line.
• Adding a Negative Number: Move to the left on the number line.
Instructions: Read each question carefully and write your answer in the space provided.
- Question 1: In the example -3 + 5, where do you start on the number line?
- Question 2: Since we are adding a positive 5, which direction do you move on the number line?
- Question 3: Solve -3 + 5 using the number line method. What is the answer?
- Question 4: What is the rule for adding a positive number on a number line? What about adding a negative number?
- Question 5: Use a number line to solve: -2 + 4. Show your steps (starting point, direction, number of spaces moved).
Click to reveal Teacher Answer Key
1. You start at -3.
2. Move to the right.
3. Starting at -3 and moving 5 spaces right lands on 2, so -3 + 5 = 2.
4. Adding a positive number: move right. Adding a negative number: move left.
5. Start at -2, move 4 spaces right (since +4 is positive), landing on 2. So -2 + 4 = 2.
Disclaimer: This worksheet was generated with AI assistance based on original video content. It is intended for educational reference only. Teachers are encouraged to review and adjust questions to fit their curriculum standards before classroom use.
🎯 Extension Activity: Have students draw their own number line from -10 to 10 on paper. Give them three integer addition problems (mixing positive and negative numbers) to solve by physically drawing the starting dot and arrow showing the movement, just like the video demonstrated.