Let's solve this addition problem. We have 8244 and 1131, and we need to add them together.

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

Step 2: We'll start by adding the digits 4 & 3 in column 2 and get 7.

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

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

So, 8244 + 1131 = 9375.

