Question

B,c,d,g va rog frumos dau coroana si 20 de puncte

Answer 1

$b) = \frac{25}{11} \times ( - \frac{7}{9} ) + \frac{74}{11} \div ( - \frac{9}{7} ) - 1 \frac{1}{8}$

$= - \frac{175}{99} - \frac{74}{11} \times \frac{7}{9} - \frac{9}{8}$

$= - \frac{175}{99} - \frac{518}{99} - \frac{9}{8}$

$= - \frac{65}{8}$

$c) = ( \frac{107}{6} - \frac{73}{4} ) \times ( - \frac{42}{5} ) + \frac{13}{2}$

$= - \frac{5}{12} \times ( - \frac{42}{5} ) + \frac{13}{2}$

$= \frac{1}{2} \times 7 + \frac{13}{2}$

$= \frac{7}{2} + \frac{13}{2}$

$= \frac{20}{2} = 10$

$d) = ( - \frac{126}{5} + ( - \frac{28}{5}) + \frac{16}{5} ) \times \frac{36}{5} \div ( - \frac{18}{5} )$

$= ( \frac{126}{5} \times \frac{5}{28} + \frac{16}{5} ) \times \frac{36}{5} \div ( - \frac{18}{5} )$

$= (9 \times \frac{1}{2} + \frac{16}{5}) \times \frac{36}{5} \div ( - \frac{18}{5} )$

$= (\frac{9}{2} + \frac{16}{5} ) \times \frac{36}{5} \div ( - \frac{18}{5} )$

$= \frac{77}{10} \times \frac{36}{5} \div ( - \frac{18}{5} )$

$= - \frac{77}{10} \times \frac{36}{5} \times \frac{5}{18}$

$= - \frac{77}{10} \times 2$

$= - \frac{77}{5}$