Calculate the Sum: 285 + 11 in Vertical Format

$\begin{aligned} &285 \\ +& \\ &~~11 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

To solve this problem effectively, we will perform vertical addition as follows:

• Step 1: Align the numbers 285 and 11 by place value:

$\begin{array}{c} ~~285 \\ +~~11 \\ \hline ~~? \\ \end{array}$

• Step 2: Add the digits in each column, starting from the rightmost (units place):

- Units Place: $5 + 1 = 6$. Write 6 in the units place.

- Tens Place: $8 + 1 = 9$. Write 9 in the tens place.

- Hundreds Place: There’s no digit to add to 2 in this column, so it remains $2$.

$\begin{array}{c} 285 \\ +11 \\ \hline 296 \\ \end{array}$

• Step 3: Compile the result to get the final sum: 296.

Therefore, the solution to the problem is $296$.