Question

Ayuda por favor 20 puntos, es urgente se los agradezco, al menos la primera ​

Answer 1

Hola!

a)

$\\ \frac{1}{5} (1 + \frac{3}{5} - \frac{9}{10} ) + [2 + 5( \frac{2}{8} - 3 )] \\ \frac{1}{5} ( \frac{10}{10} + \frac{6}{10} - \frac{9}{10} ) + [2 + (\frac{1}{4} - \frac{12}{4} )] \\ \frac{1}{5} ( \frac{7}{10} ) +[2 +( - \frac{11}{4} )] \\ \frac{7}{50} + [ \frac{8}{4} - \frac{11}{4} ] \: \:$

$\\ \frac{7}{50} + ( - \frac{3}{4} ) \\ \frac{7}{50} - \frac{3}{4} \\ \frac{28 - 150}{200} = - \frac{122}{200} = - \frac{61}{100} \:$

b)

$\\ \frac{ - \frac{6}{5} - 2( \frac{9}{2} + \frac{5}{15} ) -[ \frac{3}{4} + ( \frac{9}{7} - \frac{3}{4} )] }{ - ( \frac{3}{20} - \frac{3}{30}) + [\frac{4}{3} - ( \frac{9}{8} + \frac{8}{9} )] - (\frac{3}{4} - \frac{9}{12} )} \\ \frac{ - \frac{6}{5} - (9 + \frac{2}{3} ) -[ \frac{3}{4} + \frac{15}{28} ] \: }{ - \frac{1}{20} +[ \frac{4}{3} - \frac{17}{72}] }$

$\\ \frac{ - \frac{6}{5} - \frac{29}{3} - \frac{9}{7} }{ - \frac{1}{20} + \frac{79}{72} } \\ \frac{ - ( \frac{6}{5} + \frac{29}{3} + \frac{9}{7} ) }{ \frac{377}{360} } \\ \:$

$\\ \frac{ - (\frac{1276}{105} ) }{ \frac{377}{360} } \\ \: - \frac{1276 \times 360}{377 \times 105} = - \frac{1276 \times24}{377 \times 7} = \frac{1056}{91}$