The sum of $5 + 5$ is $10$.

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Here are 5 related questions:

1. What is $5 \times 5$?
2. What is $10 - 5$?
3. If you add $5 + 10$, what is the result?
4. How would you express $5 + 5$ using multiplication?
5. What is $5 + 5 + 5$?

Tip: Addition is one of the four basic arithmetic operations and is essential for understanding more complex mathematical concepts.