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Math worksheet for adding two multiples of 100, designed for elementary students to practice addition skills.

Worksheet titled "Add Two Multiples of 100" with math problems for adding multiples of 100, featuring a space for the student's name and a smiley face.

Worksheet titled "Add Two Multiples of 100" with math problems for adding multiples of 100, featuring a space for the student's name and a smiley face.

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Show Answer Key & Explanations Step-by-step solution for: Add Two Multiples of 100: Horizontal Addition - Math Worksheets ...
Sure! Let’s solve the worksheet “Add Two Multiples of 100” step by step.

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🧠 Concept:


All numbers here are multiples of 100 (like 100, 200, 300, ..., 900).
To add them, you can think of them as “hundreds”:

> Example:
> 300 + 900 = 3 hundreds + 9 hundreds = 12 hundreds = 1200

You can also just add the numbers in front and then add two zeros at the end.

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Solutions:



#### Left Column:

1. 300 + 900 = 1200
→ 3 + 9 = 12 → 1200

2. 200 + 500 = 700
→ 2 + 5 = 7 → 700

3. 900 + 900 = 1800
→ 9 + 9 = 18 → 1800

4. 600 + 600 = 1200
→ 6 + 6 = 12 → 1200

5. 700 + 600 = 1300
→ 7 + 6 = 13 → 1300

6. 800 + 700 = 1500
→ 8 + 7 = 15 → 1500

7. 900 + 800 = 1700
→ 9 + 8 = 17 → 1700

8. 700 + 500 = 1200
→ 7 + 5 = 12 → 1200

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#### Right Column:

1. 800 + 200 = 1000
→ 8 + 2 = 10 → 1000

2. 900 + 300 = 1200
→ 9 + 3 = 12 → 1200

3. 200 + 700 = 900
→ 2 + 7 = 9 → 900

4. 100 + 400 = 500
→ 1 + 4 = 5 → 500

5. 100 + 800 = 900
→ 1 + 8 = 9 → 900

6. 500 + 300 = 800
→ 5 + 3 = 8 → 800

7. 400 + 200 = 600
→ 4 + 2 = 6 → 600

8. 100 + 300 = 400
→ 1 + 3 = 4 → 400

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📝 Final Answer Sheet:



```
300 + 900 = 1200 800 + 200 = 1000
200 + 500 = 700 900 + 300 = 1200
900 + 900 = 1800 200 + 700 = 900
600 + 600 = 1200 100 + 400 = 500
700 + 600 = 1300 100 + 800 = 900
800 + 700 = 1500 500 + 300 = 800
900 + 800 = 1700 400 + 200 = 600
700 + 500 = 1200 100 + 300 = 400
```

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Tip for Students:
Think of each number as how many *hundreds* it is. Add those, then write the total with two zeros!

Let me know if you want a printable version or more practice like this! 😊
Parent Tip: Review the logic above to help your child master the concept of printable addition worksheet 100 problems.
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