Question

Necesito ayuda urgente

Answer 1

SOLUCION:

1) Resolver:

a)

$(\dfrac{2}{5} + \dfrac{1}{2} ) *\dfrac{10}{7} = ( \dfrac{4+5}{10})* \dfrac{10}{7} \\ \\ .\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ = \dfrac{9}{10} * \dfrac{10}{7}\\ \\ .\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ = \dfrac{9*10}{10*7} \\ \\ .\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ = \dfrac{90}{70} \to \texttt{simplificas: /10 } \\ \\ .\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ = \dfrac{9}{7} \to \texttt{Rta }$

b)

$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \dfrac{15}{8} + \dfrac{1}{4} - \dfrac{1}{2} \\ \\ \texttt{comun denominador: 8 }$

$\\ \\ . \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \dfrac{( \dfrac{8}{8})15 + ( \dfrac{8}{4})1 - (\dfrac{8}{2})1 }{8} \\ \\ . \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \dfrac{( 1)15 + ( 2)1 - (4)1 }{8} \\ \\ . \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \dfrac{15 + 2 - 4 }{8} \\ \\ . \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \dfrac{13 }{8} \to \texttt{ Rta}$

2) Transformar a  n° decimal:

$a) \ \ \dfrac{17}{8} = 2,125 \\ \\ \\ b) \ \ \dfrac{5}{12} = 0,42$