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Cálculo mental

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  • 2-5x10
    -48
  • 12400/-100
    -124
  • (-10)(150)(-2)
    +3000
  • 700+350-150-100
    800
  • -1800/20
    -90
  • (2.5)(-3)
    -7.5
  • -100+35
    -65
  • 250+300-50-100+200
    600
  • (-120)(-20)
    2400
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