The sum of 11 and 144 is:

$11 + 144 = 155$

Would you like further details or have any questions? Here are some related questions:

1. What is 155 minus 11?
2. What is 144 plus 11?
3. How can we break down the addition of 11 and 144?
4. What are some properties of numbers like 11 and 144?
5. How can you use mental math to add numbers like 11 and 144?

Tip: To add numbers quickly, break them down into simpler parts, like 100 + 44 + 11.