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Phép trừ qua 10 trong phạm vi 20 ( Tiết 3 ...

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  • 15 - 9 =
    6
  • 14 - 5 + 3 =
    12
  • 15 - 8 + 3 =
    10
  • 14 - 9 =
    5
  • 14 - 5 =
    9
  • 15 - 6 =
    9
  • 15 - 5 =
    10
  • 14 - 8 =
    6
  • 14 - 9 + 6 =
    11
  • 14 - 6 + 9 =
    17
  • 14 - 6 =
    8
  • 15 - 7 =
    8
  • 14 - 7 =
    7
  • 15 - 8 =
    7
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