[{"title": "Basic Addition", "content": "Add 35 + 27. Start in the ones place: 5 + 7 = 12. Since the sum is 10 or more, write 2 and carry 1. Continue to the tens place.", "solution": "35 + 27 = 62"}, {"title": "Word Problem", "content": "A library has 988 fiction books and 688 nonfiction books. How many books does the library have in total? Identify the operation: we are combining two quantities, so we add.", "solution": "988 + 688 = 1676 books"}]