Solve 383 + 308: Three-Digit Addition in Vertical Format

To solve this problem, we will perform vertical addition, a common technique for summing numbers.

Let's add the numbers 383 and 308 step-by-step:

• Step 1: Add the units (rightmost) column:
  The units digits are 3 and 8.
  $3 + 8 = 11$.
  Since this sum is greater than 9, we write down 1 in the units place and carry over 1 to the next column (tens place).
• Step 2: Add the tens column, including the carry:
  The tens digits are 8 and 0, plus the 1 carried over.
  $8 + 0 + 1 = 9$.
  Write 9 in the tens place.
• Step 3: Add the hundreds column:
  The hundreds digits are 3 and 3.
  $3 + 3 = 6$.
  Write 6 in the hundreds place.

Putting it all together, the sum of 383 and 308 is $691$.

Therefore, the correct answer to the problem is $691$.