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Adding with double digits with regrouping

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  • 23 + 45 =
    68
  • 28 + 47 =
    75
  • 27 + 35 =
    62
  • 53 - 16 =
    36
  • 62 + 13 =
    75
  • 51 + 27 =
    78
  • 16 + 28 =
    44
  • 72 - 36 =
    36
  • 35 + 49 =
    84
  • 85 - 21 =
    64
  • 64 + 25 =
    89
  • 60 - 23 =
    37
  • 86 - 35 =
    51
  • 38 + 49 =
    87
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