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    {
      "id" : "BBA82079-F9EF-5A71-BF88-4FE5796CA33A",
      "source" : "# Multiplication properties"
    },
    {
      "id" : "94A2FCE4-2764-5E5E-A347-402048C7F242",
      "source" : "\/\/ Drag a, b, and c. All three properties keep holding."
    },
    {
      "id" : "CFD69375-15CE-5B9D-9708-11602E9E43C4",
      "source" : "a = 7 in 1 … 10"
    },
    {
      "id" : "02609D3D-4815-556D-BD87-4801985A6CFB",
      "source" : "b = 5 in 1 … 10"
    },
    {
      "id" : "573C19C6-9B35-5109-964D-11E2340AE1E1",
      "source" : "c = 3 in 1 … 10"
    },
    {
      "id" : "E6CBDEFA-F1F7-5E18-B12D-85BD526DDAE9",
      "source" : "a*b == b*a"
    },
    {
      "id" : "E0108717-C443-52FD-A511-BBBF9BD1035F",
      "source" : "a*(b*c) == (a*b)*c"
    },
    {
      "id" : "584FB5EE-F173-5A18-9A72-2E034E86EE30",
      "source" : "a*(b + c) == a*b + a*c"
    },
    {
      "id" : "0581AFD0-1318-5336-AB4B-A5EB068117BB",
      "source" : ""
    },
    {
      "id" : "746C13A7-F6DA-5EFD-AB43-40BD9C830A02",
      "source" : "# Breaking apart a big factor"
    },
    {
      "id" : "78750FCE-5337-54BD-BBCF-F8E36ADFB4BF",
      "source" : "\/\/ Split 13 into 10 and 3, then multiply each part by a."
    },
    {
      "id" : "938B24F1-106F-5597-97AF-8FC4D8D70676",
      "source" : "big factor = 13"
    },
    {
      "id" : "0B186759-0AE3-51F9-BB80-24079A96A0E5",
      "source" : "tens part = 10"
    },
    {
      "id" : "3FC14FEC-DD82-52BA-B4B8-D365863F9004",
      "source" : "ones part = big factor - tens part"
    },
    {
      "id" : "6DD90747-62D2-5FF5-A0FA-5F5957EEFF16",
      "source" : "a*tens part"
    },
    {
      "id" : "98633D06-9382-503C-A0C3-AA35BCA4B286",
      "source" : "a*ones part"
    },
    {
      "id" : "90F33D2C-B217-536F-AA61-83747F57D763",
      "source" : "a*big factor == a*tens part + a*ones part"
    }
  ],
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  "title" : "Multiplication properties"
}