To round 2.51 to the nearest whole number, you look at the digit immediately to the right of the decimal point, which is 5 in this case. Since 5 is equal to or greater than 5, you round the number up. Therefore, 2.51 rounded to the nearest whole number is 3.
To the nearest hundred: 300 To the nearest ten: 250 To the nearest one: 251
251
250
300
250
300
0
Anything from 295 to 304.
300
300.
Factors refer to whole numbers, not decimals.
251.00