Here we go! We're going to add 2231 and 7251 together.

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

Step 2: We'll start by adding the digits 3 & 5 in column 2 and get 8.

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

Step 4: We'll start by adding the digits 2 & 7 in column 4 and get 9.

So, 2231 + 7251 = 9482.

