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

$\begin{aligned} &383 \\ +& \\ &308 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

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 $691$ .

691

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