September 2023 1 8 Report
completa los espacios en blanco y resuelve las sumas, aplica la propiedad asociativa.


1. 750 + (200 + 150) = (750 + 200) + 150 750 + ____________=___________ + 150 __________ = __________


2. (19+29) + 1 = 19 + (29 + 1) _________ + 1 = 19 +___________ _______=___________


3. (33 + 10) + 40 = 33 + (10 + 40) __________+ 40 = 33 + __________
________ = ____________​

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