Question: Obtain an estimate for the following computation by rounding the numbers so that the resulting arithmetic can easily be performed by hand or in your head. Then, use a calculator to perform the computation. How reasonable is your estimate when compared to the actual answer? 339plus598 Part 1 of 3 Round the two numbers to the nearest ten. An estimate of the sum is enter your response here . Part 2 of 3 The actual sum is enter your response here . Part 3 of 3 How reasonable is your estimate when compared to the actual answer? A. Not reasonable. The estimate seems too low compared to the actual answer. B. Reasonable. The estimate seems a little lower compared to the actual answer. C. Reasonable. The estimate seems a little higher compared to the actual answer. D. Not reasonable. The estimate seems too high compared to the actual answer.

1. **State the problem:** We want to estimate the sum of $339 + 598$ by rounding each number to the nearest ten, then calculate the exact sum and compare the estimate to the actual answer. 2. **Rounding to the nearest ten:** - $339$ rounds to $340$ because the units digit $9$ is closer to $10$ than $0$. - $598$ rounds to $600$ because the units digit $8$ is closer to $10$ than $0$. 3. **Estimate the sum:** $$340 + 600 = 940$$ 4. **Calculate the actual sum:** $$339 + 598 = 937$$ 5. **Compare the estimate to the actual sum:** - The estimate is $940$. - The actual sum is $937$. - The estimate is slightly higher than the actual sum by $3$. 6. **Conclusion:** The estimate is reasonable and slightly higher than the actual answer. **Final answers:** - Estimate: $940$ - Actual sum: $937$ - Reasonableness: C. Reasonable. The estimate seems a little higher compared to the actual answer.