[{"id": 1, "type": "short_answer", "skill": "computation", "question": "Calculate: 96 + 58", "difficulty": "medium", "explanation": "Add systematically.", "needs_review": false, "correct_answer": "154"}, {"id": 2, "type": "multiple_choice", "skill": "properties", "options": ["Associative property", "Distributive property", "Commutative property", "Identity property"], "question": "Which property states a+0=a?", "difficulty": "easy", "explanation": "The identity property of addition states that adding 0 to any number gives that number.", "needs_review": false, "correct_answer": "Identity property"}, {"id": 3, "type": "short_answer", "skill": "computation", "question": "Calculate: 2 × 6", "difficulty": "medium", "explanation": "Multiply: 2×6=12", "needs_review": false, "correct_answer": "12"}, {"id": 4, "type": "short_answer", "skill": "computation", "question": "Calculate: 12 × 17", "difficulty": "medium", "explanation": "Multiply: 12×17=204", "needs_review": false, "correct_answer": "204"}, {"id": 5, "type": "short_answer", "skill": "computation", "question": "Calculate: 10 × 17", "difficulty": "medium", "explanation": "Multiply: 10×17=170", "needs_review": false, "correct_answer": "170"}]