No problem, let's work through this together. We're starting with 1146 and 8100 and adding them all up.

Step 1: We'll start by adding the digits 6 & 0 in column 1 and get 6.

Step 2: We'll start by adding the digits 4 & 0 in column 2 and get 4.

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

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

So, 1146 + 8100 = 9246.

