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CÁLCULO MENTAL

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  • 5 X8 + 10
    50
  • 9X9 +5
    86
  • 2 X 8 + 9
    25
  • 2X5+7
    17
  • 15X2+7
    37
  • 8X7+6
    62
  • 8X8 + 9
    73
  • 3X9 +8
    35
  • 6X4+7
    31
  • 7X 9 + 11
    74
  • 4X8+5
    37
  • 6X6 + 8
    44
  • 7X 7 +2
    51
  • 7X7+5
    54
  • 8X6+8
    56
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