The sum of $5 + 10$ is:

$5 + 10 = 15$

Would you like more details or have any questions?

Here are five related questions to expand on this:

1. What is $5 + 20$?
2. How do you solve $15 + 25$?
3. What is $10 + 30$?
4. Can you calculate $5 + 15 + 10$?
5. How do you add numbers using a number line?

Tip: When adding two numbers, you can visualize it by counting forward on a number line. This helps reinforce the concept of addition.