Ready to do some math? We're starting with 6515397567 and 3637633743 and adding them up.

Step 1: We'll start by adding the digits 7 & 3 in column 1 and get 10.
We'll write down the last digit 0 and carry the 1 to the next column.

Step 2: We'll start by adding the digits 6 & 4 in column 2 and get 11.
We'll write down the last digit 1 and carry the 1 to the next column.

Step 3: We'll start by adding the digits 5 & 7 in column 3 and get 13.
We'll write down the last digit 3 and carry the 1 to the next column.

Step 4: We'll start by adding the digits 7 & 3 in column 4 and get 11.
We'll write down the last digit 1 and carry the 1 to the next column.

Step 5: We'll start by adding the digits 9 & 3 in column 5 and get 13.
We'll write down the last digit 3 and carry the 1 to the next column.

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

Step 7: We'll start by adding the digits 5 & 7 in column 7 and get 13.
We'll write down the last digit 3 and carry the 1 to the next column.

Step 8: We'll start by adding the digits 1 & 3 in column 8 and get 5.

Step 9: We'll start by adding the digits 5 & 6 in column 9 and get 11.
We'll write down the last digit 1 and carry the 1 to the next column.

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

So, 6515397567 + 3637633743 = 10153031310.

