A whole number is added to a number with two digits after the decimal point. To make sure the answer is reasonable, how many digits should the sum have after the decimal point?
The answer should have two digits after the decimal point.
To ensure that the answer is reasonable, the number with two digits after the decimal point must be added to a whole number. Since the whole number does not have any digits after the decimal point, the sum would also have no digits after the decimal point. So, the answer should have 0 digits after the decimal point.
