The answer to $1 + 1$ is $2$.

Would you like a detailed explanation of addition or have any related questions?

5 Related Questions:

1. What is addition and how does it work?
2. How does addition apply to larger numbers, like $123 + 456$?
3. What happens when we add negative numbers, like $1 + (-1)$?
4. Can we add fractions, such as $\frac{1}{2} + \frac{1}{3}$?
5. How does addition relate to other operations, such as multiplication?

Tip: Addition is one of the fundamental arithmetic operations; mastering it helps build a foundation for learning more complex mathematics.