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SUMA Y RESTA

  •   0%
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  • 1/3 + 1/5
    8/15
  • 4/6 + 3 /6
    7/6 o 1 1/6
  • 5/9 - 3/9
    2/9
  • 3/4 - 1/3
    5/12
  • 4/3 -2/3
    2/3
  • 4/6 - 1/2
    2/12 o 1/6
  • 10/12 + 1/4
    52/48 , 26/24 , 13/12 o 1 1/12
  • 2/7 + 3/7
    5/7
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