Math worksheet for practicing addition of positive and negative numbers using a numberline.

You’ve uploaded a math worksheet titled “Find Positive and Negative Sums on a Numberline”. The goal is to solve each addition problem involving positive and negative integers, then match the answer to the correct letter on the number line.

Since you’ve also included the Answer Key, I’ll walk through each problem step-by-step, explain how to solve it using the number line, and verify the given answers.

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## 🔢 How to Use the Number Line:
- Start at the first number.
- If adding a positive number → move right.
- If adding a negative number → move left.
- The letter under your final position is your answer.

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# ✔ Problem-by-Problem Solution:

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🟩 First Number Line (Letters A–G)

Number line shows:
A = -3, B = -2, C = -1, D = 0, E = 1, F = 2, G = 3

#### 1) 1 + 2 =
Start at 1 → move 2 right → land on 3 → G ✔
Answer: G

#### 2) (-1) + (-2) =
Start at -1 → move 2 left → land on -3 → A ✔
Answer: A

#### 3) (-2) + 1 =
Start at -2 → move 1 right → land on -1 → C ✔
Answer: C

#### 4) 2 + (-1) =
Start at 2 → move 1 left → land on 1 → E ✔
Answer: E

#### 5) 1 + (-2) =
Start at 1 → move 2 left → land on -1 → C ✔
Answer: C

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🟩 Second Number Line (Letters A–I)

Number line shows:
A = -5, B = -4, C = -3, D = -1, E = 0, F = 1, G = 3, H = 4, I = 5

#### 6) 4 + (-1) =
Start at 4 → move 1 left → land on 3 → G ✔
Answer: G

#### 7) (-4) + (-1) =
Start at -4 → move 1 left → land on -5 → A ✔
Answer: A

#### 8) (-4) + 1 =
Start at -4 → move 1 right → land on -3 → C ✔
Answer: C

#### 9) (-1) + 4 =
Start at -1 → move 4 right → land on 3 → G ✔
Answer: G

#### 10) 1 + (-4) =
Start at 1 → move 4 left → land on -3 → C ✔
Answer: C

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🟩 Third Number Line (Letters A–I)

Number line shows:
A = -9, B = -5, C = -4, D = -1, E = 0, F = 1, G = 4, H = 5, I = 9

#### 11) 5 + (-4) =
Start at 5 → move 4 left → land on 1 → F ✔
Answer: F

#### 12) 4 + (-5) =
Start at 4 → move 5 left → land on -1 → D ✔
Answer: D

#### 13) (-5) + 4 =
Start at -5 → move 4 right → land on -1 → D ✔
Answer: D

#### 14) 5 + 4 =
Start at 5 → move 4 right → land on 9 → I ✔
Answer: I

#### 15) (-4) + 5 =
Start at -4 → move 5 right → land on 1 → F ✔
Answer: F

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## 📊 Final Answer Key (as shown in image):

```
1. G
2. A
3. C
4. E
5. C
6. G
7. A
8. C
9. G
10. C
11. F
12. D
13. D
14. I
15. F
```

✔ All answers match the provided key.

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## 💡 Teaching Tip:
This worksheet reinforces integer addition using visual number lines — great for building intuition before moving to abstract rules like “adding a negative is subtracting.”

You can also teach the rule:
> When adding two numbers with the same sign → add absolute values, keep sign.
> When adding numbers with different signs → subtract smaller from larger, keep sign of larger.

But the number line makes it intuitive!

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Let me know if you’d like printable versions or similar worksheets! 😊