We have numbers 626550635 and 455694456. Let's start adding them together.

Step 1: We'll start by adding the digits 5 & 6 in column 1 and get 11.
We'll write down the last digit 1 and carry the 1 to the next column.

Step 2: We'll start by adding the digits 3 & 5 in column 2 and get 9.

Step 3: We'll start by adding the digits 6 & 4 in column 3 and get 10.
We'll write down the last digit 0 and carry the 1 to the next column.

Step 4: We'll start by adding the digits 0 & 4 in column 4 and get 5.

Step 5: We'll start by adding the digits 5 & 9 in column 5 and get 14.
We'll write down the last digit 4 and carry the 1 to the next column.

Step 6: We'll start by adding the digits 5 & 6 in column 6 and get 12.
We'll write down the last digit 2 and carry the 1 to the next column.

Step 7: We'll start by adding the digits 6 & 5 in column 7 and get 12.
We'll write down the last digit 2 and carry the 1 to the next column.

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

Step 9: We'll start by adding the digits 6 & 4 in column 9 and get 10.
We'll write down the last digit 0 and carry the 1 to the next column.

So, 626550635 + 455694456 = 1082245091.

