Final answer:
To estimate the sum of decimals, round each decimal to the nearest whole number and add them up.
Step-by-step explanation:
To estimate the sum of the decimals by rounding to the nearest whole number, you need to round each decimal to the nearest whole number and then add them up. Rounding 5.029 to the nearest whole number gives you 5. Rounding 8.315 to the nearest whole number gives you 8. And rounding 5.284 to the nearest whole number gives you 5. Adding these rounded numbers together, the estimated sum is 18.
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