In the above number, in order of magnitude,
2 is in the tens place,
5 is in the units (or ones) place
4 is in the tenths place
9 is in the hundredths place
5 is in the thousandths place and
0 is in the ten thousandths place.
Since the digit in the place after the place required for rounding is smaller than 5 you can simply truncate (cut off) all the digits after the required rounding place. So, rounded to the nearest thousandths, the number is 25.495.
8.924
It is 6.981 when rounded to the nearest thousandth
34921.000
88.564
70.659
0.370
145 is rounded to the nearest ones. 145 rounded to the nearest thousandth is 145.000
174.689
8.246
287.287
32.346
0.301