Here are 20 addition and subtraction questions where the answers range between 15 and 45:

Addition Questions:

1. 18 + 12 = ?
2. 20 + 15 = ?
3. 27 + 16 = ?
4. 25 + 19 = ?
5. 22 + 13 = ?
6. 30 + 10 = ?
7. 24 + 18 = ?
8. 32 + 9 = ?
9. 17 + 21 = ?
10. 28 + 14 = ?

Subtraction Questions:

11. 47 - 15 = ?
12. 42 - 21 = ?
13. 36 - 20 = ?
14. 45 - 19 = ?
15. 40 - 22 = ?
16. 35 - 18 = ?
17. 39 - 16 = ?
18. 41 - 17 = ?
19. 38 - 15 = ?
20. 43 - 25 = ?

Would you like detailed solutions for these questions, or do you have any specific requirements for them?

Related Questions:

1. How do you create similar math problems with larger number ranges?
2. What strategies can help solve addition and subtraction problems more quickly?
3. Can you create a mix of addition, subtraction, multiplication, and division problems with a specified range?
4. How can these questions be made more challenging for advanced learners?
5. What are some fun ways to practice these problems with children?

Tip: Break down larger numbers into smaller, manageable chunks to simplify addition and subtraction.