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Bond [772]
3 years ago
9

Tres hermanos pintarán la fachada de su casa. Alejandro pinta

Mathematics
1 answer:
emmainna [20.7K]3 years ago
6 0

Answer:

La porción de la casa que le corresponde pintar a Alan es \frac{13}{72}

Step-by-step explanation:

Sabes que Alejandro pinta 3/8 de la casa durante el primer día, mientras que Alberto pinta 4/9 de la casa durante el segundo día. Entonces, la porción pintada de la casa durante esos dos días es la suma entre la porción pintada por Alejandro y la porción pintada por Alberto:

\frac{3}{8} +\frac{4}{9}

Un método para sumar fracciones con distinto denominador consiste en buscar el común denominador de las fracciones que se van a sumar. Para ello se multiplica los denominadores de las fracciones: 8*9= 72. El común denominador se divide entre el denominador de la primera fracción.   El resultado de la división se multiplica por el numerador de la misma fracción. Una vez que se divide y se multiplica, el resultado se coloca en el numerador con el signo correspondiente. Se realiza el mismo procedimiento con la otra fracción y se realiza la suma con los numeradores resultantes.

Entonces, en este caso se obtiene:

\frac{3}{8} +\frac{4}{9}=\frac{27+32}{72} =\frac{59}{72}

Entonces, para calcular la porción de la casa que le corresponde pintar a Alan, y considerando que 1 representa un entero, la totalidad de la casa que se desea pintar, se realiza la resta entre la totalidad de la fachada a pintar y la porción pintada por Alejandro y Alberto:

1-\frac{59}{72}

Considerando que el procedimiento de la resta es similar a la suma, se obtiene:

1-\frac{59}{72}=\frac{72-59}{72} =\frac{13}{72}

<u><em>La porción de la casa que le corresponde pintar a Alan es </em></u>\frac{13}{72}<u><em></em></u>

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