How many significant digits are there in the approximate number 2500.  Last zero should have a line over it 

The number \(2500\), with a line over the last zero, indicates that this last zero is a significant figure. The number of significant digits can now be determined as follows:

- **2** and **5** are non-zero digits, so they are significant.
- The first **0** (without a line) is not significant, as it simply acts as a placeholder.
- The second **0** (with the line over it) is significant because the line indicates this zero is explicitly counted as a significant digit.

Thus, the number **2500** with a line over the last zero has **3 significant digits**.

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Here are some related questions:

1. What are the rules for determining significant digits in decimal numbers?
2. How do significant figures affect rounding in mathematical calculations?
3. What is the difference between significant digits and decimal places?
4. How are significant digits used in scientific notation?
5. How do significant figures apply to measured vs. exact numbers?

**Tip:** When adding or subtracting, the result should have the same number of decimal places as the number with the fewest decimal places in the operation.

How many significant digits are there in the approximate number 2500? Last zero should have a line over it.

Understand how to count significant digits in the number 2500, where the last zero has a line over it. Learn the rules of significant figures, how they apply to rounding, and the importance of zeros in scientific notation. This example helps clarify the concept of significant digits for students in Grades 8-10.

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