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Sindrei [870]
2 years ago
5

SUMA Y RESTA DE FRACCIONES

Mathematics
1 answer:
Kitty [74]2 years ago
8 0

Answer:

  • Camila y Hania fueron las que comieron más pastel
  • Entre las tres comieron \frac{5}{6} de pastel
  • Sobró \frac{1}{6} de pastel

Step-by-step explanation:

La pregunta está mal formulada. Debería ser :

A Valentina le tocó 1/6 , a Camila 1/3 y a Hania 2/6 del pastel.

Para responder a la pregunta de quién comió más pastel podemos proceder de varias formas.

Una forma es expresar las fracciones de manera decimal :

Valentina : \frac{1}{6}=0.1666

Camila : \frac{1}{3}=0.3333

Hania : \frac{2}{6}=0.3333

Así nos daríamos cuenta de que Camila y Hania fueron las que comieron más pastel (Vale aclarar que Camila y Hania comieron la misma cantidad).

Otra posible forma es igualando los denominadores de las fracciones y comparando sus numeradores.

Por ejemplo, \frac{1}{3} se puede expresar como \frac{1}{3}=\frac{2}{6} (multiplicamos por dos tanto al numerador como al denominador) ⇒ las nuevas fracciones correspondientes a lo que comió cada una son :

Valentina : \frac{1}{6}

Camila : \frac{2}{6}

Hania : \frac{2}{6}

Dado que todas las fracciones tienen el mismo denominador (seis) comparamos ahora sus numeradores y nos damos cuenta de nuevo que Camila y Hania fueron las que comieron más pastel.

Con las tres fracciones con el mismo denominador (seis) procedemos a responder la segunda pregunta :

¿Qué fracción de pastel comieron entre las tres?

Para averiguarlo sumaremos las fracciones de pastel que comió cada una :

\frac{1}{6}+\frac{2}{6}+\frac{2}{6}=\frac{5}{6}

Encontramos que entre Valentina, Camila y Hania comieron \frac{5}{6} de pastel.

Finalmente, para averiguar que fracción de pastel sobró debemos restarle al total (uno) la fracción de pastel que comieron entre las tres :

1-\frac{5}{6}=\frac{1}{6}

Esto se debe a que el ''uno'' representa el ciento por ciento del pastel (el total). Encontramos que sobró \frac{1}{6} de pastel.

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