If a number is already a whole number, and you are being asked to round it to the nearest whole number, then you don't need to round it anymore, since itself is the nearest whole number.
work out
48.81 will round up to 49.
I think you round it to the nearest whole number...
You see which tick is nearer to the point on the number line.
You can't convert a number with decimals (or a fraction) to a whole number, without losing precision. You can round it to the nearest number, or truncate it (just remove the decimals), but in any case, that won't be the same number (just the nearest integer, in case you choose to round it), so "2.8 as a whole number" really doesn't exist.
Anything between 16.5 and 17.49
A number with decimals (digits after the decimal point) is not equal to ANY whole number. You can round it to the nearest whole number, if you like - that's the closest you can get.
11A whole number is a positive number without decimals. To find the closest whole number version of 10.555, round it to the nearest number. Since 5 and above round up, 10.555 rounds to 11.
The decimals of: 34.5, 34.6, 34.7, 34.8 and 34.9 all round up to 35
When rounding 9.5 to the nearest whole number, you look at the decimal part. Since 0.5 is exactly halfway between 0 and 1, you round up to the nearest whole number. Therefore, 9.5 rounded to the nearest whole number is 10.
0.05 rounded to the nearest whole number is 0. When rounding decimals to the nearest whole number, you look at the digit immediately to the right of the decimal point. If it is 5 or greater, you round up; if it is less than 5, you round down. In this case, 0.05 is less than 0.5, so it rounds down to 0.