https://file.aiquickdraw.com/mathbot/file/172853739338465zmiyok.jpg

Let's analyze each number line problem and identify the computation it models along with a brief justification.

### Problem 3:
Each part shows a number line with arrows indicating movement across values. The directions of these arrows will help determine whether each part models addition or subtraction.

#### Part a:
- **Description**: The arrow moves from 5 to 2.
- **Computation**: \(5 - 3 = 2\)
- **Justification**: The movement from 5 to 2 is to the left, which represents subtraction. Specifically, it shows starting at 5 and subtracting 3 to reach 2.

#### Part b:
- **Description**: The arrow moves from 7 to 4.
- **Computation**: \(7 - 3 = 4\)
- **Justification**: Similar to part (a), this also represents subtraction. Starting at 7, moving left by 3 units reaches 4, so it models subtracting 3 from 7.

#### Part c:
- **Description**: The arrow moves from 2 to 8.
- **Computation**: \(2 + 6 = 8\)
- **Justification**: This shows addition because the movement is to the right. Starting at 2 and moving 6 units to the right brings you to 8, which models adding 6 to 2.

Would you like further details on any of these explanations?

### Related Questions:
1. What type of computation would a leftward movement on the number line always represent?
2. How would you model the subtraction of a negative number on a number line?
3. Can you explain how addition can also be represented by repeated jumps to the right on a number line?
4. How would a number line look if it represented the equation \(10 - 5 = 5\)?
5. Can the number line method be extended to represent multiplication or division? How?

#### Tip:
Using number lines is a visual way to understand addition and subtraction, especially with negative numbers or when explaining absolute value.

Identify the computation modeled by each number line and briefly justify your answer.

Analyze number line problems to model addition and subtraction. Learn how movements to the left represent subtraction and movements to the right represent addition. Suitable for students in Grades 4-6.

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