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Actividad 7.2 Cálculo mental (D)

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Instrucciones: Realice las siguientes operaciones mentalmente, tome en cuenta que solo tendrá 30 segundos para resolver cada operación.
Es importante que en esta actividad no utilice calculadora, los cálculos deberá realizarlos mentalmente.

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Guatemala
This activity is a version of Actividad 7.2 Cálculo mental

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