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Addition and subtraction

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  • 7-4=?
    3
  • 5+4=?
    9
  • 6-3=?
    3
  • 2+2=?
    4
  • 1+1=?
    2
  • 6+1=?
    7
  • 8-3=?
    5
  • 8-4=?
    4
  • 7+3=?
    10
  • 9-1=?
    8
  • 1+8=?
    9
  • 6+2=?
    8
  • 9-5=?
    4
  • 6+3=?
    9
  • 3-2=?
    1
  • 9-4=?
    5
  • 4-2=?
    2
  • 5+2=?
    7
  • 6+2=?
    8
  • 10-4=?
    6
  • 3+3=?
    6
  • 10-5=?
    5
  • 7+1=?
    8
  • 2+3=
    5
  • 10-2=?
    8
  • 8+1=?
    9
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