Can you Describe an algorithm for adding and subtracting decimal numbers?

To add or subtract decimal numbers, align the numbers by their decimal points and fill in any empty spaces with zeros. For addition, start from the rightmost digit, adding each column and carrying over any values greater than 10 to the next column on the left. For subtraction, also start from the right, borrowing from the next column if the top digit is smaller than the bottom digit. Continue this process until all columns have been processed, ensuring to place the decimal point in the same position as in the original numbers.