$1 + 1 = 2$.

Would you like more details or have any questions about this? Here are some related questions:

1. What is $2 + 2$?
2. How do you add larger numbers like $123 + 456$?
3. What is the sum of $3 + 7$?
4. How do you subtract $2 - 1$?
5. What is the value of $1 + 1 + 1$?

Tip: When adding two numbers, you're essentially combining their values to get a total sum.