Question
15. Use rounding to estimate the sum. \( 0.98+0.8+7.49 \) \( \begin{array}{ll}\text { A. } 7 & \text { B. } 8 \\ \text { C. } 9 & \text { D. } 10\end{array} \)
Ask by Evans Black. in the United States
Jan 27,2025
Real Tutor Solution
Tutor-Verified Answer
Answer
The estimated sum is 9.
Solution
To estimate the sum of \( 0.98 + 0.8 + 7.49 \) using rounding, follow these steps:
1. **Round Each Number to the Nearest Whole Number:**
- **0.98** rounds up to **1**.
- **0.8** rounds up to **1**.
- **7.49** rounds down to **7**.
2. **Add the Rounded Numbers:**
\[
1 + 1 + 7 = 9
\]
**Therefore, the estimated sum is **9**.
**Answer:**
**C. 9**
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Simplify this solution Bonus Knowledge
To estimate the sum using rounding, we can round each number to the nearest whole number. So, \(0.98\) rounds to \(1\), \(0.8\) rounds to \(1\), and \(7.49\) rounds to \(7\). Adding these rounded numbers together gives us \(1 + 1 + 7 = 9\). Therefore, the estimated sum is closest to option C, which is \(9\). In real life, rounding is often used in budgeting and finance. For instance, when estimating expenses for a project, rounding can help you get a quick sense of how much you will need, making it easier to manage resources without getting bogged down in exact figures. This makes it a handy tool for anyone trying to keep their finances on track!
