If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.
If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Rounding is useful when you are trying to roughly estimate numbers.
Use a number line to round two-digit numbers to the nearest ten.
Use a number line to round three-digit numbers to the nearest hundred.
Round up to four-digit numbers to the nearest ten and hundred.
Practice rounding to the nearest ten and rounding to the nearest hundred.
Practice rounding to the nearest ten and rounding to the nearest hundred on the number line.
Give your brain a workout with these challenge problems on rounding.