We are presented with 3293697998 and 3754884849. Let's work out the sum.

Step 1: We'll start by adding the digits 8 & 9 in column 1 and get 17.
We'll write down the last digit 7 and carry the 1 to the next column.

Step 2: We'll start by adding the digits 9 & 4 in column 2 and get 14.
We'll write down the last digit 4 and carry the 1 to the next column.

Step 3: We'll start by adding the digits 9 & 8 in column 3 and get 18.
We'll write down the last digit 8 and carry the 1 to the next column.

Step 4: We'll start by adding the digits 7 & 4 in column 4 and get 12.
We'll write down the last digit 2 and carry the 1 to the next column.

Step 5: We'll start by adding the digits 9 & 8 in column 5 and get 18.
We'll write down the last digit 8 and carry the 1 to the next column.

Step 6: We'll start by adding the digits 6 & 8 in column 6 and get 15.
We'll write down the last digit 5 and carry the 1 to the next column.

Step 7: We'll start by adding the digits 3 & 4 in column 7 and get 8.

Step 8: We'll start by adding the digits 9 & 5 in column 8 and get 14.
We'll write down the last digit 4 and carry the 1 to the next column.

Step 9: We'll start by adding the digits 2 & 7 in column 9 and get 10.
We'll write down the last digit 0 and carry the 1 to the next column.

Step 10: We'll start by adding the digits 3 & 3 in column 10 and get 7.

So, 3293697998 + 3754884849 = 7048582847.

