To estimate 537 and 281 by rounding to the nearest ten:
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Round 537 to the nearest ten:
- 537 rounds to 540.
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Round 281 to the nearest ten:
- 281 rounds to 280.
Now, add the rounded numbers:
540 + 280 = 820.
So, the estimated sum is:
Estimate: 820
And for the actual sum of 537 + 281:
537 + 281 = 818.
So, filling in the boxes:
Estimate: 820
537 + 281 = 818