Answer :

To solve this problem, let's go through it step-by-step:

a. Identify the Largest 5-Digit Number:
- The largest 5-digit number is 99,999. This is because the highest digit we can use is 9, and filling all five places with this digit gives us the largest possible number with five digits.

b. Add 1 to the Largest 5-Digit Number:
- Now, we will add 1 to our identified largest 5-digit number:

[tex]\[99,999 + 1 = 100,000\][/tex]

Conclusion:

The operation of adding 1 to the largest 5-digit number yields the following result:

[tex]\[99,999 + 1 = 100,000\][/tex]

Thus, after adding 1 to the largest 5-digit number, you get 100,000.