Speed Grid Addition 6×6 Medium — Set 13

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        "operation": "speed-grid",
        "subject": "arithmetic",
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        "problems": [
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                "type": "speed-grid",
                "subType": "speed-grid",
                "difficulty": "medium",
                "question": "Speed Grid (+): Fill in each cell by applying the operation to the row and column headers. Row headers: [6, 7, 8], Column headers: [9, 8, 9]",
                "answer": "Row 6: [15, 14, 15]; Row 7: [16, 15, 16]; Row 8: [17, 16, 17]",
                "operation": "+",
                "rowHeaders": [
                    6,
                    7,
                    8
                ],
                "colHeaders": [
                    9,
                    8,
                    9
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                "cells": [
                    [
                        15,
                        14,
                        15
                    ],
                    [
                        16,
                        15,
                        16
                    ],
                    [
                        17,
                        16,
                        17
                    ]
                ]
            },
            {
                "type": "speed-grid",
                "subType": "speed-grid",
                "difficulty": "medium",
                "question": "Speed Grid (-): Fill in each cell by applying the operation to the row and column headers. Row headers: [2, 1, 4], Column headers: [6, 7, 10]",
                "answer": "Row 2: [4, 5, 8]; Row 1: [5, 6, 9]; Row 4: [2, 3, 6]",
                "operation": "-",
                "rowHeaders": [
                    2,
                    1,
                    4
                ],
                "colHeaders": [
                    6,
                    7,
                    10
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                "cells": [
                    [
                        4,
                        5,
                        8
                    ],
                    [
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                        6,
                        9
                    ],
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                        6
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                ]
            }
        ],
        "layout": {
            "columns": 2,
            "problemsPerPage": 20
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    },
    "outputTargets": {
        "screen": true,
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    "_archetype": "guided-solver",
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