Question

desarrollar los 5 primeros ejercicios.

c59f4fbeb506a39b53640fe321f0c0d1.pdf

Answer 1

Respuesta:

Explicación paso a paso:

Pregunta 1.

$\frac{5}{9} \times \frac{4}{11} \times 9900\\\\\frac{5\times 4 \times 9900}{9\times 11} \\\\\frac{20\times 9900}{99}\\\\20\times 100\\\\\boxed {2000}$

Pregunta 2.

la mitad (1/2) de (x) la quinta parte (1/5) de (x) las tres cuartas partes (3/4) de (x) 480.

$\frac{1}{2}\times \frac{1}{5}\times \frac{3}{4}\times 480 \\\\\frac{3\times 480}{2\times 5\times 4}\\\\ \frac{3\times 480}{40}\\\\ 3\times 12\\\\\boxed {36}$

Pregunta 3.

Total: 9+5+7+4=25

Blancas: 5

¿Qué fracción del total son blancas?

$x\times 25=5\\\\x=\frac{5}{25} \\\\x=\frac{1}{5} \\\\\boxed {\frac{1}{5} }$

Pregunta 4.

$\frac{1}{8} +\frac{1}{10} =\frac{1}{x} \\\\\frac{8+10}{8\times 10} =\frac{1}{x} \\\\\frac{18}{80} =\frac{1}{x} \\\\x=\frac{80}{18}\\\\ x=\frac{40}{9} \\\\\boxed {x=4\frac{4}{9}\ dias}$

Pregunta 5.

$x+\frac{4}{11} =\frac{2}{3} \times \frac{5}{7} \times \frac{4}{9} \times \frac{6}{11} \times 7\\\\x+\frac{4}{11} =\frac{2\times 5\times 4 \times 6\times 7}{3\times 7\times 9\times 11}\\\\x+\frac{4}{11} =\frac{2\times 5\times 4 \times 2}{9\times 11}\\\\x+\frac{4}{11} =\frac{80}{99}\\\\x=\frac{80}{99}-\frac{4}{11} \\\\x=\frac{80}{99}-\frac{4\times 9}{11\times 9} \\\\x=\frac{80}{99}-\frac{36}{99} \\\\x=\frac{80-36}{99} \\\\x=\frac{44}{99} \\\\\boxed {x=\frac{4}{9}}$