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Addition and subtraction

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  • 90 - 72
    18
  • 12 + 54
    66
  • 23 + 23
    46
  • 54 + 62
    116
  • 99 + 21
    120
  • 24 - 1
    23
  • 79 + 35
    114
  • 49 + 55
    104
  • 13 - 6
    7
  • 82 - 63
    19
  • 26 - 23
    3
  • 10 - 5
    5
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  • 67 + 89
    156
  • 64 - 52
    12
  • 100 + 49
    149
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