NBT.A.4. - Use place value understanding to round decimals to any place
In 5th grade we build upon our knowledge of rounding from 4th grade, except in 5th grade students are expected to be able to round to the fractional pieces as well.
More rounding tutorials
The videos below have more explanation on how to round numbers to decimal places. For practice, get a sheet of paper and after seeing the problems, try to solve the problems given and play the video to see if you did them correctly.