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Construcción de un repertorio de resultados de sumas y resta

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Rocio Valenzuela

on 5 September 2014

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Transcript of Construcción de un repertorio de resultados de sumas y resta

Construcción de un repertorio de resultados de sumas y restas que facilite el cálculo mental (descomposiciones aditivas de los números, complementos a 10, etcétera).

El complemento a 10 es el número que sumado a otro número da el valor de 10.
Ejemplo:
6 es el complemento de 4, porque:
4 + 6 = 10
Para encontrar el número que falta en una suma cuando su resultado es 10, se debe utilizar el complemento a 10.
Ejemplo:
Hallar el número que falta en la suma:

3 + ? = 10
La respuesta es 7.
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