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  • 83 + ___ = 90
    7
  • 35 + ___ = 40
    5
  • 21 + ___= 30
    9
  • 52 + ___ = 60
    8
  • 78 + ___ = 80
    2
  • 96 + ___ = 100
    4
  • 23 + ___ = 30
    7
  • 74 + ___ = 80
    6
  • 63 + ___= 70
    7
  • 14 + ___ = 20
    6
  • 41 + ___ = 50
    9
  • 52 + ___ = 60
    8
  • 84 + ___ = 90
    6
  • 30 + ___ = 40
    10
  • 47 + ___ = 50
    3
  • 69 + ___ = 70
    1
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