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Bổ trợ sta1

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  • 3 + 2 = ___
    5
  • 6 - 2 = ___
    4
  • 4 - 3 = ___
    1
  • 15 - 7 = ___
    8
  • 3 + 12 = ___
    15
  • 10 - 7 = ___
    3
  • 0 + 8 = ___
    8
  • 1 + 6 = ___
    7
  • 20 - 5 = ___
    15
  • 9 + 8 = ___
    17
  • 14 - 4 = ___
    10
  • 7 + 5 = ___
    12
  • 6 + 4 = ___
    10
  • 18 - 9 = ___
    9
  • 10 + 6 = ___
    16
  • 9 - 5 = ___
    4
  • 8 - 0 = ___
    8
  • 7 + 3 = ___
    10
  • 13 - 6 = ___
    7
  • 5 + 4 = ___
    9