Answer:
Rounding is used in instances where you can only have a limited number of digits or You must round to the nearest digit.
Explanation:
For example lets say i have the problem 12.5 + 4 + 3.2.
I am told to round up to the nearest whole number.
After adding all the numbers up, I find I have 19.7 since the tenths place is a 7, I would round up leaving my final answer as 20.