Question

7 supra 5 impartit la 14 supra 15 plus 3 supra 2 impartit la 9 supra 4 minus 1 ori 1 supra2ori 2 supra 7​

Answer 1

Răspuns: $\frac{85}{42}$

$\frac{7}{5}: \frac{14}{15}+ \frac{3}{2}: \frac{9}{4}- \frac{1*1}{2} *\frac{2}{7}$

= $\frac{7}{5} * \frac{15}{14}+ \frac{3}{2}* \frac{4}{9}- \frac{1}{2}* \frac{2}{7}$

= $\frac{1}{1} * \frac{3}{2}+ \frac{1}{1}* \frac{2}{3}- \frac{1}{1} * \frac{1}{7}$

= $\frac{3}{2} + \frac{2}{3}- \frac{1}{7}$

= $\frac{63}{42} + \frac{28}{42} - \frac{6}{42}$

= $\frac{85}{42}$