{
  "name": "Additon and Subtraction",
  "order": 2,
  "challenges": [
    {
      "id": "59a5801209a6acac5983b411",
      "title": "Add Whole Numbers",
      "description": [
        ""
      ],
      "challengeSeed": [
        ""
      ],
      "tests": [
        ""
      ]
    },
    {
      "id": "59a5801209a6acac59836306",
      "title": "Subtract Whole Numbers",
      "description": [
        ""
      ],
      "challengeSeed": [
        ""
      ],
      "tests": [
        ""
      ]
    },
    {
      "id": "59a5801209a6acac59836307",
      "title": "Estimate Whole Number Sums and Differences",
      "description": [
        ""
      ],
      "challengeSeed": [
        ""
      ],
      "tests": [
        ""
      ]
    }
  ]
}