Let's get this math done. We have 3005 and 102 and we're going to add them all together.

Step 1: We'll start by adding the digits 5 & 2 in column 1 and get 7.

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

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 3 & 0 in column 4 and get 3.

So, 3005 + 102 = 3107.

