[{"title": "Basic Addition", "content": "Add 49 + 59. Start in the ones place: 9 + 9 = 18. Since the sum is 10 or more, write 8 and carry 1. Continue to the tens place.", "solution": "49 + 59 = 108"}, {"title": "Word Problem", "content": "A library has 226 fiction books and 532 nonfiction books. How many books does the library have in total? Identify the operation: we are combining two quantities, so we add.", "solution": "226 + 532 = 758 books"}]