Respuesta:
[tex] \frac{1}{2} + \frac{3}{4} + 1 = \frac{2 + 3 + 4}{4} = \frac{9}{4} = 2 \frac{1}{4} kg[/tex]
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Respuesta:
[tex] \frac{1}{2} + \frac{3}{4} + 1 = \frac{2 + 3 + 4}{4} = \frac{9}{4} = 2 \frac{1}{4} kg[/tex]