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The image contains a worksheet titled "Rounding Off To The Nearest Thousand And Estimation" with three parts (a), (b), and (c). The task is to fill in missing numbers on number lines, using the rounding concept to the nearest thousand. Let's break down each part:

### (a)
The number line is between 6400 and 6600. The midpoint of this range is 6500.
- The first missing box should be **6400**.
- The second missing box should be **6500**.
- The third missing box should be **6600**.

### (b)
The number line ranges between 7000 and 9000, with two missing boxes.
- The midpoint is 8000.
- The first missing box should be **7000**.
- The second missing box should be **8000**.
- The last box is labeled as **9000**.

### (c)
This number line spans from 100,000 to 135,000.
- The midpoint would be 117,500, but the nearest thousand rounding concept suggests rounding closer.
- The first box should be **100,000**.
- The second missing box should be **120,000**.
- The last box is labeled as **135,000**.

If you need more detailed explanations or additional steps for rounding, feel free to ask! Would you like me to assist further? 

Here are five related questions to enhance your understanding:
1. How do you determine the midpoint of a number line?
2. What are the steps for rounding a number to the nearest thousand?
3. Can rounding affect the accuracy of calculations, and how?
4. How would you round 15,850 to the nearest thousand?
5. What is the difference between rounding and estimating?

**Tip:** When rounding numbers, always check if the digit immediately to the right of the rounding digit is 5 or greater to know whether to round up.

Worksheet on rounding off to the nearest thousand and estimation with missing values in number lines for 3 ranges.

This worksheet focuses on rounding off numbers to the nearest thousand using number lines. Includes examples with number ranges like 6400 to 6600, 7000 to 9000, and 100,000 to 135,000. Suitable for Grades 4-6.

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