[{"title": "Basic Addition", "content": "Add 15 + 53. Start in the ones place: 5 + 3 = 8. Write 8. Continue to the tens place.", "solution": "15 + 53 = 68"}, {"title": "Word Problem", "content": "A library has 924 fiction books and 966 nonfiction books. How many books does the library have in total? Identify the operation: we are combining two quantities, so we add.", "solution": "924 + 966 = 1890 books"}]