#### Answer

$3925 \approx 3930$
$11,243 \approx 11,240$
$15,974 \approx 15,970$
$17,916 \approx 17,920$
$534,883 \approx 534,880$
$2,788,000 \approx 2,788,000$

#### Work Step by Step

Round each number to the nearest 10. If the digit in the ones position is 4 or less, leave the number in the tens position as is and move zero to the ones position. If the digit in the ones position is 5 or greater, add one to the number in the tens position and move zero to the ones position.
$3925 \approx 3930$
$11,243 \approx 11,240$
$15,974 \approx 15,970$
$17,916 \approx 17,920$
$534,883 \approx 534,880$
$2,788,000 \approx 2,788,000$