{
  "paper": {
    "school": "Nan Chiau Primary School",
    "year": 2022,
    "level": "P2",
    "label": "Learning Review",
    "source_prefix": "Nan Chiau 2022 P2 Learning Review",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 2,
      "question": "How many [?] are there?",
      "answer0": "204",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 29,
      "difficulty_id": 2,
      "explanation": "Two filled hundred-squares make 200, plus 4 single squares = 204.",
      "hints": ["Each big grid of 100 squares is a hundred.", "Count the hundreds, then add the extra single squares."],
      "source": "Nan Chiau 2022 P2 Learning Review Q1",
      "image_needed": true,
      "image_options": false,
      "image_file": "q1.png",
      "notes": "Figure: two 10x10 grids (= 200) and 4 small single squares = 204. Count to verify = 204. The '[?]' in stem refers to a small-square symbol shown in the original. image_page 3 (PDF page 3), figure top of page below the question."
    },
    {
      "n": 2,
      "type_id": 2,
      "question": "In 926, the digit [?] is in the hundreds place.",
      "answer0": "9",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 29,
      "difficulty_id": 1,
      "explanation": "In 926, 9 is in the hundreds place, 2 in the tens, 6 in the ones.",
      "hints": ["The hundreds place is the leftmost digit of a 3-digit number."],
      "source": "Nan Chiau 2022 P2 Learning Review Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    },
    {
      "n": 3,
      "type_id": 2,
      "question": "Write three hundred and eight in numerals.",
      "answer0": "308",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 30,
      "difficulty_id": 1,
      "explanation": "Three hundred and eight = 308 (no tens).",
      "hints": ["Three hundreds, no tens, eight ones."],
      "source": "Nan Chiau 2022 P2 Learning Review Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    },
    {
      "n": 4,
      "type_id": 2,
      "question": "Arrange the numbers from the greatest to the smallest.\n714 , 147 , 174 , 417",
      "answer0": "714",
      "answer1": "417",
      "answer2": "174",
      "answer3": "147",
      "correct_answer": null,
      "skill_id": 31,
      "difficulty_id": 2,
      "explanation": "Compare hundreds first: 714 > 417 > 174 > 147.",
      "hints": ["Compare the hundreds digit first.", "Greatest first means largest number goes in the first blank."],
      "source": "Nan Chiau 2022 P2 Learning Review Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Ordering task: four blanks in order greatest to smallest."
    },
    {
      "n": 5,
      "type_id": 2,
      "question": "Find 428 - 307.",
      "answer0": "121",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 34,
      "difficulty_id": 1,
      "explanation": "428 - 307 = 121.",
      "hints": ["Subtract ones, tens, then hundreds."],
      "source": "Nan Chiau 2022 P2 Learning Review Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    },
    {
      "n": 6,
      "type_id": 2,
      "question": "725 + 9 = [?]",
      "answer0": "734",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 34,
      "difficulty_id": 1,
      "explanation": "725 + 9 = 734.",
      "hints": ["Add 9 to the ones; 5 + 9 = 14, regroup."],
      "source": "Nan Chiau 2022 P2 Learning Review Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    },
    {
      "n": 7,
      "type_id": 2,
      "question": "Add 28 and 694.",
      "answer0": "722",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 34,
      "difficulty_id": 1,
      "explanation": "28 + 694 = 722.",
      "hints": ["Line up by place value and add, regrouping as needed."],
      "source": "Nan Chiau 2022 P2 Learning Review Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    },
    {
      "n": 8,
      "type_id": 2,
      "question": "Subtract 23 from 600.",
      "answer0": "577",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 34,
      "difficulty_id": 2,
      "explanation": "600 - 23 = 577.",
      "hints": ["Regroup from the hundreds since the tens and ones are 0."],
      "source": "Nan Chiau 2022 P2 Learning Review Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "What is the missing number in the box?",
      "answer0": "2",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 34,
      "difficulty_id": 2,
      "explanation": "91[?] - 343 = 569, so 91[?] = 569 + 343 = 912; the missing ones digit is 2.",
      "hints": ["Add 569 and 343 to find the top number.", "The box is the ones digit of the top number."],
      "source": "Nan Chiau 2022 P2 Learning Review Q9",
      "image_needed": true,
      "image_options": false,
      "image_file": "q9.png",
      "notes": "Figure: vertical subtraction layout '9 1 [box=?]' minus '3 4 3' equals '5 6 9'. Answer = 2. image_page 5 (PDF page 5), middle of page below the question."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "Lisa thinks of a 3-digit odd number.\nThe digit 4 is in the hundreds place.\nThe value of the digit 1 is 10.\nThe digit in the ones place is more than 5 but less than 8.\nWhat is the number?",
      "answer0": "417",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 29,
      "difficulty_id": 3,
      "explanation": "Hundreds = 4, tens = 1 (value 10). Ones is 6 or 7 (more than 5, less than 8); odd means 7. Number = 417.",
      "hints": ["Value of digit 1 is 10 means 1 is in the tens place.", "Ones is 6 or 7; an odd number ends in an odd digit."],
      "source": "Nan Chiau 2022 P2 Learning Review Q10",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "James had 8 stamps at first.\nHis brother gave him 4 stamps.\nHis mother bought him another 5 stamps.\nHow many stamps did James have altogether?",
      "answer0": "17",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "8 + 4 + 5 = 17 stamps.",
      "hints": ["Add the stamps he started with to what he was given.", "8 + 4 + 5."],
      "source": "Nan Chiau 2022 P2 Learning Review Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    },
    {
      "n": 12,
      "type_id": 0,
      "question": "Sally and Don have 200 seashells. Sally has 80 seashells.\nWhich of the following statement(s) is/are correct?\nTick the box(es) that is/are correct.\nDon has 280 seashells.\nDon has 120 seashells.\nSally has more seashells than Don.\nSally has fewer seashells than Don.",
      "answer0": "Don has 280 seashells.",
      "answer1": "Don has 120 seashells.",
      "answer2": "Sally has more seashells than Don.",
      "answer3": "Sally has fewer seashells than Don.",
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "Don has 200 - 80 = 120 seashells, which is more than Sally's 80, so Sally has fewer than Don.",
      "hints": ["Find Don's amount: 200 - 80.", "Then compare with Sally's 80."],
      "source": "Nan Chiau 2022 P2 Learning Review Q12",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Interactive tick-the-box (multiple-correct), no single app type. Correct boxes: 'Don has 120 seashells.' (answer1) AND 'Sally has fewer seashells than Don.' (answer3). Don = 200 - 80 = 120."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "James has 530 stickers. William has 160 stickers.\nHow many stickers do they have altogether?",
      "answer0": "690",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 1,
      "explanation": "530 + 160 = 690 stickers.",
      "hints": ["Altogether means add the two amounts."],
      "source": "Nan Chiau 2022 P2 Learning Review Q13",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    },
    {
      "n": 14,
      "type_id": 2,
      "question": "Yassin bakes 277 cookies. Kim bakes 430 cookies.\nHow many more cookies does Kim bake than Yassin?",
      "answer0": "153",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "430 - 277 = 153 more cookies.",
      "hints": ["'How many more' means subtract the smaller from the larger.", "430 - 277."],
      "source": "Nan Chiau 2022 P2 Learning Review Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key prints '430 + 277 = 153' which is a typo for the subtraction 430 - 277 = 153; answer 153 is correct."
    },
    {
      "n": 15,
      "type_id": 2,
      "question": "A florist had 503 stalks of roses.\nAfter selling some stalks of roses, she had 95 stalks of roses left.\nHow many stalks of roses did she sell?",
      "answer0": "408",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "503 - 95 = 408 stalks sold.",
      "hints": ["Sold = had at first - left over.", "503 - 95."],
      "source": "Nan Chiau 2022 P2 Learning Review Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": ""
    }
  ]
}