Answer
40
Work Step by Step
$4\underset\uparrow3$
Since the ones place is less than five, the tens place is not changed when rounding. The ones place is zeroed out.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.