Question

Estimate the following sum by rounding off the numbers to their nearest thousands and compare the result with the actual sum: $68,283+1,843$

Answer 1

Step 1: Round-off the given numbers to their nearest thousands and find their sum.

$68,283$ rounded off to the nearest thousands = $68,000$

$1,843$ rounded off to the nearest thousands = $2,000$

Therefore, their estimated sum = $68,000+2,000$ = $70,000$

Step 2: Find the actual sum of given numbers.

Actual sum = $68,283+1,843$ = $70,126$

Step 3: If the estimated sum is close to the actual sum then the answer is a good estimate or else the answer is not a good estimate.

Since, estimated sum, here, $70,000$ is close to the actual sum, here, $70,126$. So, the answer is a good estimate.

Hence, the sum by rounding off the numbers to their nearest thousands is $70,000$ and the answer is a good estimate.