{
 "source": "https://peabody.kids/flashcards/facts-doubles",
 "id": "facts-doubles",
 "title": "Doubles and Halves",
 "category": "math",
 "subject": "Arithmetic facts",
 "levels": [
  "k-2"
 ],
 "description": "Doubles from 1 to 20 and their halves.",
 "tags": [
  "facts",
  "doubles",
  "halves"
 ],
 "frontLabel": "Problem",
 "backLabel": "Answer",
 "cards": [
  [
   "1 + 1",
   "2"
  ],
  [
   "Half of 2",
   "1"
  ],
  [
   "2 + 2",
   "4"
  ],
  [
   "Half of 4",
   "2"
  ],
  [
   "3 + 3",
   "6"
  ],
  [
   "Half of 6",
   "3"
  ],
  [
   "4 + 4",
   "8"
  ],
  [
   "Half of 8",
   "4"
  ],
  [
   "5 + 5",
   "10"
  ],
  [
   "Half of 10",
   "5"
  ],
  [
   "6 + 6",
   "12"
  ],
  [
   "Half of 12",
   "6"
  ],
  [
   "7 + 7",
   "14"
  ],
  [
   "Half of 14",
   "7"
  ],
  [
   "8 + 8",
   "16"
  ],
  [
   "Half of 16",
   "8"
  ],
  [
   "9 + 9",
   "18"
  ],
  [
   "Half of 18",
   "9"
  ],
  [
   "10 + 10",
   "20"
  ],
  [
   "Half of 20",
   "10"
  ],
  [
   "11 + 11",
   "22"
  ],
  [
   "Half of 22",
   "11"
  ],
  [
   "12 + 12",
   "24"
  ],
  [
   "Half of 24",
   "12"
  ],
  [
   "13 + 13",
   "26"
  ],
  [
   "Half of 26",
   "13"
  ],
  [
   "14 + 14",
   "28"
  ],
  [
   "Half of 28",
   "14"
  ],
  [
   "15 + 15",
   "30"
  ],
  [
   "Half of 30",
   "15"
  ],
  [
   "16 + 16",
   "32"
  ],
  [
   "Half of 32",
   "16"
  ],
  [
   "17 + 17",
   "34"
  ],
  [
   "Half of 34",
   "17"
  ],
  [
   "18 + 18",
   "36"
  ],
  [
   "Half of 36",
   "18"
  ],
  [
   "19 + 19",
   "38"
  ],
  [
   "Half of 38",
   "19"
  ],
  [
   "20 + 20",
   "40"
  ],
  [
   "Half of 40",
   "20"
  ]
 ]
}