Math Match Money Expert — Set 90

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    "problems": [
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                {
                    "expr": "1+6",
                    "value": 7
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                {
                    "expr": "2+8",
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                {
                    "expr": "4-4",
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                {
                    "expr": "8+9",
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                    "expr": "7x7",
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            "answer": "1+6=7; 2+8=10; 4-4=0; 8+9=17; 7x7=49",
            "question": "Match each expression with its answer: 1+6=?, 2+8=?, 4-4=?, 8+9=?, 7x7=?",
            "difficulty": "expert"
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        {
            "type": "math-match",
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                    "expr": "4x9",
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                    "expr": "8x8",
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            "answer": "4x9=36; 7x8=56; 10+1=11; 8x8=64; 6x7=42",
            "question": "Match each expression with its answer: 4x9=?, 7x8=?, 10+1=?, 8x8=?, 6x7=?",
            "difficulty": "expert"
        },
        {
            "type": "math-match",
            "subType": "math-match",
            "pairs": [
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                    "expr": "7-3",
                    "value": 4
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                {
                    "expr": "2+3",
                    "value": 5
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                {
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                    "value": 6
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                {
                    "expr": "2-2",
                    "value": 0
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                {
                    "expr": "4x3",
                    "value": 12
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            ],
            "answer": "7-3=4; 2+3=5; 2x3=6; 2-2=0; 4x3=12",
            "question": "Match each expression with its answer: 7-3=?, 2+3=?, 2x3=?, 2-2=?, 4x3=?",
            "difficulty": "expert"
        },
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            "type": "math-match",
            "subType": "math-match",
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                {
                    "expr": "6+3",
                    "value": 9
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                {
                    "expr": "7-5",
                    "value": 2
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                {
                    "expr": "10-5",
                    "value": 5
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                {
                    "expr": "2+8",
                    "value": 10
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                {
                    "expr": "3x6",
                    "value": 18
                }
            ],
            "answer": "6+3=9; 7-5=2; 10-5=5; 2+8=10; 3x6=18",
            "question": "Match each expression with its answer: 6+3=?, 7-5=?, 10-5=?, 2+8=?, 3x6=?",
            "difficulty": "expert"
        },
        {
            "type": "math-match",
            "subType": "math-match",
            "pairs": [
                {
                    "expr": "7x2",
                    "value": 14
                },
                {
                    "expr": "6-5",
                    "value": 1
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                {
                    "expr": "8-5",
                    "value": 3
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                {
                    "expr": "4-2",
                    "value": 2
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                {
                    "expr": "6+10",
                    "value": 16
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            ],
            "answer": "7x2=14; 6-5=1; 8-5=3; 4-2=2; 6+10=16",
            "question": "Match each expression with its answer: 7x2=?, 6-5=?, 8-5=?, 4-2=?, 6+10=?",
            "difficulty": "expert"
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            "type": "math-match",
            "subType": "math-match",
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                {
                    "expr": "5x9",
                    "value": 45
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                {
                    "expr": "8x6",
                    "value": 48
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                {
                    "expr": "4x9",
                    "value": 36
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                {
                    "expr": "3+10",
                    "value": 13
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                {
                    "expr": "5-1",
                    "value": 4
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            "answer": "5x9=45; 8x6=48; 4x9=36; 3+10=13; 5-1=4",
            "question": "Match each expression with its answer: 5x9=?, 8x6=?, 4x9=?, 3+10=?, 5-1=?",
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                {
                    "expr": "7-6",
                    "value": 1
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                {
                    "expr": "9x2",
                    "value": 18
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                {
                    "expr": "7-7",
                    "value": 0
                },
                {
                    "expr": "5x4",
                    "value": 20
                },
                {
                    "expr": "10+1",
                    "value": 11
                }
            ],
            "answer": "7-6=1; 9x2=18; 7-7=0; 5x4=20; 10+1=11",
            "question": "Match each expression with its answer: 7-6=?, 9x2=?, 7-7=?, 5x4=?, 10+1=?",
            "difficulty": "expert"
        },
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            "type": "math-match",
            "subType": "math-match",
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                {
                    "expr": "5-3",
                    "value": 2
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                    "expr": "9+6",
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                    "expr": "3+6",
                    "value": 9
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                {
                    "expr": "9-6",
                    "value": 3
                },
                {
                    "expr": "9x3",
                    "value": 27
                }
            ],
            "answer": "5-3=2; 9+6=15; 3+6=9; 9-6=3; 9x3=27",
            "question": "Match each expression with its answer: 5-3=?, 9+6=?, 3+6=?, 9-6=?, 9x3=?",
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