Solve Vertical Addition: 689 + 317 Step-by-Step

$\begin{aligned} &689 \\ +& \\ &317 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

To solve this problem, we will perform vertical addition starting from the rightmost digit:

• Step 1: Add the units digits.
  $9 + 7 = 16$. Write down $6$ and carry over $1$ to the tens place.
• Step 2: Add the tens digits.
  $8 + 1 = 9$, now add the carry $1$, so $9 + 1 = 10$. Write down $0$ and carry over $1$ to the hundreds place.
• Step 3: Add the hundreds digits.
  $6 + 3 = 9$, now add the carry $1$, so $9 + 1 = 10$. Write down $0$ in the hundreds place and write down $1$ in the thousands place (since it's the final column, the carry becomes a leading digit).

Therefore, the sum of $689$ and $317$ is $\mathbf{1006}$.