Ready to do some math? We're starting with 2012 and 6143 and adding them up.

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 0 & 1 in column 3 and get 1.

Step 4: We'll start by adding the digits 2 & 6 in column 4 and get 8.

So, 2012 + 6143 = 8155.

