easy Set 4 Unknown

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    "title": "form-exercise set 4",
    "operation": "number-sense",
    "subject": "arithmetic",
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    "problems": [
        {
            "id": 1,
            "type": "integers",
            "expression": "(-6) + (-1)",
            "correctAnswer": "-7",
            "question": "(-6) + (-1) = ?"
        },
        {
            "id": 2,
            "type": "integers",
            "expression": "(-4) + (-8)",
            "correctAnswer": "-12",
            "question": "(-4) + (-8) = ?"
        },
        {
            "id": 3,
            "type": "integers",
            "expression": "(-2) + 8",
            "correctAnswer": "6",
            "question": "(-2) + 8 = ?"
        },
        {
            "id": 4,
            "type": "integers",
            "expression": "9 + 2",
            "correctAnswer": "11",
            "question": "9 + 2 = ?"
        },
        {
            "id": 5,
            "type": "integers",
            "expression": "4 + 9",
            "correctAnswer": "13",
            "question": "4 + 9 = ?"
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            "id": 6,
            "type": "integers",
            "expression": "(-10) + 3",
            "correctAnswer": "-7",
            "question": "(-10) + 3 = ?"
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            "id": 7,
            "type": "integers",
            "expression": "7 + 8",
            "correctAnswer": "15",
            "question": "7 + 8 = ?"
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            "id": 8,
            "type": "integers",
            "expression": "(-6) + 1",
            "correctAnswer": "-5",
            "question": "(-6) + 1 = ?"
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            "id": 9,
            "type": "integers",
            "expression": "(-10) + 6",
            "correctAnswer": "-4",
            "question": "(-10) + 6 = ?"
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            "type": "integers",
            "expression": "(-10) + 5",
            "correctAnswer": "-5",
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            "id": 11,
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            "expression": "6 + (-5)",
            "correctAnswer": "1",
            "question": "6 + (-5) = ?"
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            "id": 12,
            "type": "integers",
            "expression": "1 + 9",
            "correctAnswer": "10",
            "question": "1 + 9 = ?"
        },
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            "id": 13,
            "type": "integers",
            "expression": "0 + (-10)",
            "correctAnswer": "-10",
            "question": "0 + (-10) = ?"
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            "type": "integers",
            "expression": "3 + (-2)",
            "correctAnswer": "1",
            "question": "3 + (-2) = ?"
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            "id": 15,
            "type": "integers",
            "expression": "(-4) + 4",
            "correctAnswer": "0",
            "question": "(-4) + 4 = ?"
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            "type": "integers",
            "expression": "(-10) + (-3)",
            "correctAnswer": "-13",
            "question": "(-10) + (-3) = ?"
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            "id": 17,
            "type": "integers",
            "expression": "(-9) + 1",
            "correctAnswer": "-8",
            "question": "(-9) + 1 = ?"
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            "id": 18,
            "type": "integers",
            "expression": "4 + 1",
            "correctAnswer": "5",
            "question": "4 + 1 = ?"
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            "id": 19,
            "type": "integers",
            "expression": "7 + (-6)",
            "correctAnswer": "1",
            "question": "7 + (-6) = ?"
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            "id": 20,
            "type": "integers",
            "expression": "1 + 0",
            "correctAnswer": "1",
            "question": "1 + 0 = ?"
        }
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