{
  "name": "Add and Subtract Decimals",
  "order": 18,
  "challenges": [
    {
      "id": "59a5801209a6acac5983b428",
      "title": "Add and Subtract Decimal Numbers",
      "description": [
        ""
      ],
      "challengeSeed": [
        ""
      ],
      "tests": [
        ""
      ]
    },
    {
      "id": "59a5801209a6acac59836409",
      "title": "Mental Math to Add and Subtract Decimals",
      "description": [
        ""
      ],
      "challengeSeed": [
        ""
      ],
      "tests": [
        ""
      ]
    },
    {
      "id": "59a5801209a6acac59836410",
      "title": "Add and Subtract Decimals with Front-End Estimation",
      "description": [
        ""
      ],
      "challengeSeed": [
        ""
      ],
      "tests": [
        ""
      ]
    },
    {
      "id": "59a5801209a6acac59836411",
      "title": "Round Decimals to Estimate Sums and Differences",
      "description": [
        ""
      ],
      "challengeSeed": [
        ""
      ],
      "tests": [
        ""
      ]
    }
  ]
}