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Math operations

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  • 18 - 9
    9
  • ten + seven
    seventeen
  • 9 - 4
    5
  • 5 + 7
    12
  • eleven + three
    fourteen
  • 8 + 8
    16
  • thirteen + six
    nineteen
  • 8 + 7
    15
  • 10 + 10
    20
  • four + seven
    eleven
  • 3 + 15
    18
  • 20 - 7
    13
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