{
  "slug": "times-table-dash",
  "title": "Times Table Dash",
  "subject": "Math",
  "notes": "Problems are generated: each item is one times table. The game asks factor × m (or m × factor) for every m from 1 to 12, in shuffled order, and offers the right product plus two nearby wrong products that are never equal to it. The tip is shown after a wrong answer. Standards are Common Core State Standards for Mathematics.",
  "levels": [
    {
      "id": 1,
      "name": "Twos, fives and tens",
      "grades": "Grades 2–3",
      "skill": "times.easy",
      "items": [
        {
          "id": "x2",
          "name": "2 times table",
          "factor": 2,
          "multipliers": [
            1,
            12
          ],
          "shows": "2 × m or m × 2, with m from 1 to 12",
          "answer": "2 × m",
          "tip": "Times 2 is doubling: 2 × 7 is 7 + 7 = 14.",
          "example": "2 × 7 = 14",
          "standard": "CCSS.MATH.CONTENT.3.OA.C.7: fluently multiply within 100; know from memory all products of two one-digit numbers",
          "source": "https://www.thecorestandards.org/Math/Content/3/OA/"
        },
        {
          "id": "x5",
          "name": "5 times table",
          "factor": 5,
          "multipliers": [
            1,
            12
          ],
          "shows": "5 × m or m × 5, with m from 1 to 12",
          "answer": "5 × m",
          "tip": "Every answer in the 5 times table ends in 0 or 5.",
          "example": "5 × 9 = 45",
          "standard": "CCSS.MATH.CONTENT.3.OA.C.7: fluently multiply within 100; know from memory all products of two one-digit numbers",
          "source": "https://www.thecorestandards.org/Math/Content/3/OA/"
        },
        {
          "id": "x10",
          "name": "10 times table",
          "factor": 10,
          "multipliers": [
            1,
            12
          ],
          "shows": "10 × m or m × 10, with m from 1 to 12",
          "answer": "10 × m",
          "tip": "Times 10 puts a zero on the end: 10 × 6 = 60.",
          "example": "10 × 6 = 60",
          "standard": "CCSS.MATH.CONTENT.3.OA.C.7 (fluently multiply within 100), extended here to 10 × 12",
          "source": "https://www.thecorestandards.org/Math/Content/3/OA/"
        }
      ]
    },
    {
      "id": 2,
      "name": "Threes, fours and sixes",
      "grades": "Grade 3",
      "skill": "times.middle",
      "items": [
        {
          "id": "x3",
          "name": "3 times table",
          "factor": 3,
          "multipliers": [
            1,
            12
          ],
          "shows": "3 × m or m × 3, with m from 1 to 12",
          "answer": "3 × m",
          "tip": "Times 3 is the number added three times: 3 × 4 = 4 + 4 + 4 = 12.",
          "example": "3 × 4 = 12",
          "standard": "CCSS.MATH.CONTENT.3.OA.C.7: fluently multiply within 100; know from memory all products of two one-digit numbers",
          "source": "https://www.thecorestandards.org/Math/Content/3/OA/"
        },
        {
          "id": "x4",
          "name": "4 times table",
          "factor": 4,
          "multipliers": [
            1,
            12
          ],
          "shows": "4 × m or m × 4, with m from 1 to 12",
          "answer": "4 × m",
          "tip": "Times 4 is double, then double again: 4 × 6 → 12 → 24.",
          "example": "4 × 6 = 24",
          "standard": "CCSS.MATH.CONTENT.3.OA.C.7 (fluently multiply within 100); the tip uses the associative property, 3.OA.B.5",
          "source": "https://www.thecorestandards.org/Math/Content/3/OA/"
        },
        {
          "id": "x6",
          "name": "6 times table",
          "factor": 6,
          "multipliers": [
            1,
            12
          ],
          "shows": "6 × m or m × 6, with m from 1 to 12",
          "answer": "6 × m",
          "tip": "Times 6 is times 5 plus one more group: 6 × 7 = 35 + 7 = 42.",
          "example": "6 × 7 = 42",
          "standard": "CCSS.MATH.CONTENT.3.OA.C.7 (fluently multiply within 100); the tip uses the distributive property, 3.OA.B.5",
          "source": "https://www.thecorestandards.org/Math/Content/3/OA/"
        }
      ]
    },
    {
      "id": 3,
      "name": "Sevens to twelves",
      "grades": "Grades 3–4",
      "skill": "times.hard",
      "items": [
        {
          "id": "x7",
          "name": "7 times table",
          "factor": 7,
          "multipliers": [
            1,
            12
          ],
          "shows": "7 × m or m × 7, with m from 1 to 12",
          "answer": "7 × m",
          "tip": "Times 7 is times 5 plus times 2: 7 × 8 = 40 + 16 = 56.",
          "example": "7 × 8 = 56",
          "standard": "CCSS.MATH.CONTENT.3.OA.C.7 (fluently multiply within 100); the tip uses the distributive property, 3.OA.B.5",
          "source": "https://www.thecorestandards.org/Math/Content/3/OA/"
        },
        {
          "id": "x8",
          "name": "8 times table",
          "factor": 8,
          "multipliers": [
            1,
            12
          ],
          "shows": "8 × m or m × 8, with m from 1 to 12",
          "answer": "8 × m",
          "tip": "Times 8 is doubling three times: 8 × 6 → 12 → 24 → 48.",
          "example": "8 × 6 = 48",
          "standard": "CCSS.MATH.CONTENT.3.OA.C.7 (fluently multiply within 100); the tip uses the associative property, 3.OA.B.5",
          "source": "https://www.thecorestandards.org/Math/Content/3/OA/"
        },
        {
          "id": "x9",
          "name": "9 times table",
          "factor": 9,
          "multipliers": [
            1,
            12
          ],
          "shows": "9 × m or m × 9, with m from 1 to 12",
          "answer": "9 × m",
          "tip": "Times 9 is times 10 minus one group: 9 × 7 = 70 − 7 = 63.",
          "example": "9 × 7 = 63",
          "standard": "CCSS.MATH.CONTENT.3.OA.C.7 (fluently multiply within 100), extended here to 9 × 12; the tip uses the distributive property, 3.OA.B.5",
          "source": "https://www.thecorestandards.org/Math/Content/3/OA/"
        },
        {
          "id": "x11",
          "name": "11 times table",
          "factor": 11,
          "multipliers": [
            1,
            12
          ],
          "shows": "11 × m or m × 11, with m from 1 to 12",
          "answer": "11 × m",
          "tip": "Times 11 is times 10 plus one more group: 11 × 12 = 120 + 12 = 132.",
          "example": "11 × 12 = 132",
          "standard": "CCSS.MATH.CONTENT.3.OA.C.7 (fluently multiply within 100), extended here to 12 × 12 (multiplying by a two-digit number like 11 or 12 is 4.NBT.B.5); the tip uses the distributive property, 3.OA.B.5",
          "source": "https://www.thecorestandards.org/Math/Content/3/OA/"
        },
        {
          "id": "x12",
          "name": "12 times table",
          "factor": 12,
          "multipliers": [
            1,
            12
          ],
          "shows": "12 × m or m × 12, with m from 1 to 12",
          "answer": "12 × m",
          "tip": "Times 12 is times 10 plus times 2: 12 × 7 = 70 + 14 = 84.",
          "example": "12 × 7 = 84",
          "standard": "CCSS.MATH.CONTENT.3.OA.C.7 (fluently multiply within 100), extended here to 12 × 12 (multiplying by a two-digit number like 11 or 12 is 4.NBT.B.5); the tip uses the distributive property, 3.OA.B.5",
          "source": "https://www.thecorestandards.org/Math/Content/3/OA/"
        }
      ]
    }
  ]
}