Addition Special Types Missing Addend — Set 55

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                "question": "27 + 11 = ___",
                "answer": 38
            },
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                "operand1": 52,
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                "operator": "+",
                "question": "52 + 17 = ___",
                "answer": 69
            },
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            },
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                "question": "63 + 24 = ___",
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            },
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                "id": 11,
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            },
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                "question": "15 + 23 = ___",
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            },
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                "question": "31 + 23 = ___",
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                "question": "41 + 16 = ___",
                "answer": 57
            },
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                "id": 17,
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                "operand2": 10,
                "operator": "+",
                "question": "10 + 10 = ___",
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                    "operation": "add",
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            {
                "id": 18,
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                "question": "14 + 31 = ___",
                "answer": 45
            },
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                "id": 19,
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                "question": "63 + 14 = ___",
                "answer": 77
            },
            {
                "id": 20,
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                "operator": "+",
                "question": "23 + 61 = ___",
                "answer": 84
            }
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        "layout": {
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    },
    "outputTargets": {
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    "_archetype": "form-exercise",
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