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Adding Doubles + 1

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  • 3 + 4 =
    7
  • 1 + 2 =
    3
  • 7 + 8 =
    15
  • 8 + 9 =
    17
  • 2 + 3 =
    5
  • 3 + 4 =
    7
  • 10 + 11 =
    21
  • 9 + 10 =
    19
  • 6 + 7 =
    13
  • 7 + 8 =
    15
  • 2 + 3 =
    5
  • 4 + 5 =
    9
  • 5 + 6 =
    11
  • 8 + 9 =
    17
  • 1 + 2 =
    3
  • 7 + 8 =
    15
  • 8 + 9 =
    17
  • 9 + 10 =
    19
  • 4 + 5 =
    9
  • 6 + 7 =
    13
  • 6 + 7 =
    13
  • 5 + 6 =
    11
  • 10 + 11 =
    21
  • 9 + 10 =
    19
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