You see which tick is nearer to the point on the number line.
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.
I think you round it to the nearest whole number...
48.81 will round up to 49.
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.
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.
You round .4 .3 .2 and .1 down and .5 .6 .7 .8 and .9 up.
The decimals of: 34.5, 34.6, 34.7, 34.8 and 34.9 all round up to 35
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.
10 is the nearest whole number to 9.5, when dealing with decimals, numbers 1-4 round down and 5-9 rounds up. For example for rounding down, if you have 9.4, you round it to 9 and not 10.