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To estimate the answer to \( 2.59 + 3.675 + 8.124 \) by first rounding each number to **1 significant figure**, let's go through the process step by step:

1. **Round each number to 1 significant figure:**
   - \( 2.59 \) rounds to \( 3 \)
   - \( 3.675 \) rounds to \( 4 \)
   - \( 8.124 \) rounds to \( 8 \)

2. **Now, add the rounded values:**
   \[
   3 + 4 + 8 = 15
   \]

Thus, the estimated answer is **15**.

Would you like any more details or have further questions?

Here are 5 related questions:
1. What is meant by "significant figure" in rounding?
2. How would rounding to two significant figures affect this estimate?
3. Can rounding lead to inaccuracies in certain types of calculations?
4. What is the difference between rounding to significant figures and decimal places?
5. How would the original sum \( 2.59 + 3.675 + 8.124 \) compare to this estimate?

**Tip:** When rounding, always consider the first non-zero digit as the most significant digit.

By first rounding each number to 1 significant figure, estimate the answer to 2.59 + 3.675 + 8.124

Learn how to estimate the sum of 2.59 + 3.675 + 8.124 by rounding each number to 1 significant figure. This estimation process simplifies calculations by rounding numbers to their first non-zero digit. Suitable for Grades 6-8.

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