Reported to the correct number of significant figures, what is the result of the subtraction 2.9-1.819 ?

To perform the subtraction and report the result to the correct number of significant figures, follow these steps:

1. **Subtraction**:
   \[
   2.9 - 1.819 = 1.081
   \]

2. **Determine the number of significant figures**:
   - The number 2.9 has 2 significant figures.
   - The number 1.819 has 4 significant figures.

3. **Applying significant figures rule**:
   - In subtraction (and addition), the result should be reported with the same number of decimal places as the number with the least decimal places.
   - 2.9 has 1 decimal place, so the result should be rounded to 1 decimal place.

4. **Round the result**:
   \[
   1.081 \text{ rounded to 1 decimal place} = 1.1
   \]

**Final Answer**: The result is \(1.1\), reported to the correct number of significant figures.

Would you like more details on this process or have any questions?

Here are 5 related questions for further exploration:
1. How do you determine significant figures in multiplication and division?
2. What is the significance of significant figures in scientific measurements?
3. How do you round numbers when dealing with significant figures?
4. Can you explain how significant figures differ in addition/subtraction versus multiplication/division?
5. How would you report the result of \(3.456 \times 2.1\) using significant figures?

**Tip**: Always remember that in addition and subtraction, the precision of your result is based on the number with the least decimal places, not the least significant figures.

Learn how to subtract 2.9 and 1.819 while reporting the result to the correct number of significant figures. Understand the rules for determining significant figures in subtraction and rounding the result accordingly. Suitable for Grades 9-12 students studying scientific measurements and precision.

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