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速算(4) P1 雙位數的進位加法

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  • 46 + 26 =
    72
  • 29 + 29 =
    58
  • 39 + 39 =
    78
  • 27 + 45 =
    72
  • 15 + 25 =
    40
  • 16 + 16 =
    32
  • 55 + 16 =
    71
  • 28 + 8 =
    36
  • 34 + 38 =
    72
  • 5 + 38 =
    43
  • 48 + 18 =
    66
  • 58 + 13 =
    61
  • 27 + 27 =
    54
  • 9 + 42 =
    51
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