Alright, let's solve this problem step by step. We have 8212 and 1043 and we're adding them together.

Step 1: We'll start by adding the digits 2 & 3 in column 1 and get 5.

Step 2: We'll start by adding the digits 1 & 4 in column 2 and get 5.

Step 3: We'll start by adding the digits 2 & 0 in column 3 and get 2.

Step 4: We'll start by adding the digits 8 & 1 in column 4 and get 9.

So, 8212 + 1043 = 9255.

