Answer:

The largest 5-digit number is 99,999.

The largest 6-digit number formed using the digits 5, 4, 7, 0, 6, and 1 only once is 765,410.

Now, add the two numbers:

99,999 + 765,410 = 865,409

So, the sum of the largest 5-digit number and the largest 6-digit number formed using the digits 5, 4, 7, 0, 6, and 1 only once is 865,409.

Answer:

765410+076541= 841951

i hope it helps you