The image shows the mathematical expression:

$13 + 7.69$

To solve this, we simply add the two numbers together:

$13 + 7.69 = 20.69$

Thus, the result of the addition is 20.69.

Would you like further details or have any other questions?

Here are five related questions to further your practice:

1. What is the result of $15.3 + 8.4$?
2. How would you subtract $7.69$ from $13$?
3. What is $13 + 7.693$ if rounded to two decimal places?
4. What would $13.45 + 7.69$ be?
5. How would you approach solving $13 + 7.69 - 5$?

Tip: When adding decimals, ensure that you align the decimal points properly for accurate addition.