1. The problem asks us to estimate the sum of 5.2 and 176.2. 2. To estimate, we round each number to the nearest whole number: 5.2 rounds to 5 and 176.2 rounds to 176. 3. Now, add the rounded numbers: $$5 + 176 = 181$$ 4. Therefore, the estimated sum is 181. 5. Among the given choices, the closest estimate is A 181.