Let's solve each addition problem using the number line method as shown in the worksheet. The goal is to
add two numbers and
use the number line to visually show how you find the sum. We’ll go step by step.
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🔹 Problem 1:
20 + 20 = ?
- Start at
20 on the number line.
- Move
20 units to the right (since we're adding 20).
- You land on
40.
✔ So,
20 + 20 = 40
---
🔹 Problem 2:
35 + 15 = ?
- Start at
35.
- Move
15 units to the right.
- From 35 → 40 (5 steps)
- Then 40 → 50 (10 more steps) → total 15 steps
- You land on
50.
✔ So,
35 + 15 = 50
---
🔹 Problem 3:
30 + 15 = ?
- Start at
30.
- Move
15 units to the right.
- 30 → 35 (5 steps), then 35 → 45 (10 more steps) → total 15
- Land on
45.
✔ So,
30 + 15 = 45
---
🔹 Problem 4:
5 + 25 = ?
- Start at
5.
- Move
25 units to the right.
- 5 → 10 (5 steps), 10 → 15 (5), 15 → 20 (5), 20 → 25 (5), 25 → 30 (5) → total 25 steps
- Land on
30.
✔ So,
5 + 25 = 30
---
🔹 Problem 5:
25 + 20 = ?
- Start at
25.
- Move
20 units to the right.
- 25 → 30 (5), 30 → 35 (5), 35 → 40 (5), 40 → 45 (5) → total 20 steps
- Land on
45.
✔ So,
25 + 20 = 45
---
✔ Final Answers:
1. 20 + 20 =
40
2. 35 + 15 =
50
3. 30 + 15 =
45
4. 5 + 25 =
30
5. 25 + 20 =
45
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📌 How to Show It on the Number Line:
For each problem, draw an arrow starting from the first number and moving right by the amount of the second number. For example:
- For
20 + 20: Draw an arrow from 20 to 40.
- For
35 + 15: Arrow from 35 to 50.
This helps visualize addition as "jumping" along the number line.
Let me know if you'd like a visual representation or help filling out the worksheet!
Parent Tip: Review the logic above to help your child master the concept of addition worksheet up to 50.
