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The question asks to estimate a 15% tip on a dinner bill of **$41.81**, by first rounding the bill to the nearest ten dollars.

### Steps:
1. **Round the bill**: 
   - The bill is **$41.81**, which rounds to **$40** (since it is closer to 40 than 50).
   
2. **Calculate 15% tip**: 
   - $ 15\% $ of **$40** is calculated as:
   \[
   0.15 \times 40 = 6
   \]

So, the estimated tip is **$6**.

Would you like more details or have any other questions?

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Here are some related questions:
1. How do you calculate a 15% tip without rounding?
2. What is the exact tip if you don't round the bill?
3. How does rounding affect the accuracy of tips?
4. What is the easiest way to estimate tips for other percentages, like 20%?
5. How would you estimate tips for a bill between two rounded values?

**Tip:** When estimating percentages, rounding the bill to a simpler number can help you calculate more quickly in your head.

Estimate a 15% tip on a dinner bill of $41.81 by first rounding the bill amount to the nearest ten dollars.

Learn how to estimate a 15% tip on a dinner bill of $41.81 by rounding the bill amount to the nearest ten dollars and calculating the tip. Suitable for middle school students in Grades 6-8.

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