1 plus 1 equals 2.

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

1. How do you add fractions?
2. What is the sum of 3/4 and 1/2?
3. Can you explain the concept of addition in different number systems?
4. What are the properties of addition?
5. How do you solve addition problems with variables?

Tip: When adding numbers, always align them by their place values to avoid errors.