September 2023 1 20 Report
resuelve las siguientes operaciones y observa los resultados

a. 2 ( 12 + 8 ) + 40 = 12 + ( 8 + 40 ) = ____ + 40 = 12 + _____ = _____ = _____


b. 200 + (700 + 100) = (200 +700) + 100
200 + _____ =_____ + 100 _____ = _____


c. 18 + ( 11 + 9) = (18 + 11) + 9 = 18 + _____ = _____ + 9 = ______ = ______


d. ( 30 + 15 ) + 50 = 30 + ( 15 + 50 ) = _____ + 50 = 30 + _____
_____ = _____​

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