OK, let's do this. We've got 211 and 526 and we're adding them all together.

Step 1: We'll start by adding the digits 1 & 6 in column 1 and get 7.

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

Step 3: We'll start by adding the digits 2 & 5 in column 3 and get 7.

So, 211 + 526 = 737.

