Okay, we are tasked with adding 5242411505 and 707547072. Let's begin!

Step 1: We'll start by adding the digits 5 & 2 in column 1 and get 7.

Step 2: We'll start by adding the digits 0 & 7 in column 2 and get 7.

Step 3: We'll start by adding the digits 5 & 0 in column 3 and get 5.

Step 4: We'll start by adding the digits 1 & 7 in column 4 and get 8.

Step 5: We'll start by adding the digits 1 & 4 in column 5 and get 5.

Step 6: We'll start by adding the digits 4 & 5 in column 6 and get 9.

Step 7: We'll start by adding the digits 2 & 7 in column 7 and get 9.

Step 8: We'll start by adding the digits 4 & 0 in column 8 and get 4.

Step 9: We'll start by adding the digits 2 & 7 in column 9 and get 9.

Step 10: We'll start by adding the digits 5 & 0 in column 10 and get 5.

So, 5242411505 + 707547072 = 5949958577.

