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Subtraction within 20

  •   0%
  •  0     0     0

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  • 17 - 7=_______
    10
  • 17 - 9 = ____
    8
  • 15 - 8 = _______
    7
  • 19 - 8 =_________
    11
  • 15 - 6 = _____
    9
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