Solve Vertical Addition: 845 + 27 Step by Step

To solve this problem, we'll follow these steps:

• Step 1: Align the numbers vertically by place value.
• Step 2: Start adding from the rightmost column (ones place), carrying over when necessary.
• Step 3: Add all columns and account for any carried-over digits.

Now, let's work through each step:
Step 1: Align the numbers:
$\begin{aligned} &845 \\ + &~27 \\ \end{aligned}$

Step 2: Add the digits in the ones place:
$5 + 7 = 12$. Write 2 below the line in the ones place, carry over 1 to the tens place.

Step 3: Add the digits in the tens place, including the carry:
$4 + 2 + 1 = 7$. Write 7 below the line in the tens place.

Step 4: Add the digits in the hundreds place:
Since there is no carry here, it's $8 + 0 = 8$. Write 8 in the hundreds place.

Therefore, the sum is $872$, which corresponds to choice 1.