Addition Special Types Missing Addend — Set 91

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                "question": "51 + 14 = ___",
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                "question": "13 + 21 = ___",
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                "operand1": 16,
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                "question": "10 + 54 = ___",
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                "question": "56 + 30 = ___",
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                "operand1": 32,
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                "id": 11,
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                "question": "21 + 36 = ___",
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                "question": "81 + 18 = ___",
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                "question": "20 + 66 = ___",
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                "question": "63 + 16 = ___",
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                "question": "13 + 13 = ___",
                "answer": 26
            },
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                "operand1": 25,
                "operand2": 32,
                "operator": "+",
                "question": "25 + 32 = ___",
                "answer": 57
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    "_archetype": "form-exercise",
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