[{"title": "Basic Addition", "content": "Add 50 + 58. Start in the ones place: 0 + 8 = 8. Write 8. Continue to the tens place.", "solution": "50 + 58 = 108"}, {"title": "Word Problem", "content": "A library has 654 fiction books and 617 nonfiction books. How many books does the library have in total? Identify the operation: we are combining two quantities, so we add.", "solution": "654 + 617 = 1271 books"}]