When rounding, look at the number one place to the right of the place you are rounding to. If that number is <5, then you keep the place you are rounding to the same and fill in with 0's to the right. If the number is ≥5, then increase the place by one and fill in with 0's to the right.
109865
To the nearest 100: 109865 --> 6 is ≥5, so rounded it is: 109900
To the nearest 1000: 109865 --> 8 is ≥5, so rounded it is: 110000*
* The 9 had to be rounded to a 10, so a one carries over one place to the left.
To the nearest 10: 109865 --> 5 is ≥5, so rounded it is: 109870
To the nearest 10000: 109865 --> 9 is ≥5, so rounded it is: 110000
Hope this helps! :)
