Answer:
A Whole number are exact numbers like 0,1,2,3 ......
Whole number are a set of positive integers along with 0 and exclude fractions and decimals numbers.
The general rule for rounding off is;
* If the number you are rounding off is followed by 5,6,7,8, or 9 round the number up.
or
* If the number you are rounding off is followed by 0,1,2,3,4, round the number down.
To find 6.4 rounded to the nearest whole number.
By the rule of rounding off;
As 4 is the first figure to be discarded and this is less than 5
then, the previous figure (i.,e 6) there would be no change.
Therefore, the number 6.4 rounded to the nearest whole number is 6.