Question

Efectuati: [(1/2+2/3+5/6):12/7-6 ori 1/18] ori 1/4:(5 ori 12/25-3/4)=..........

Answer 1

$[( \frac{1}{2}+ \frac{2}{3} + \frac{5}{6} )]: \frac{12}{7} -6* \frac{1}{18} ]* \frac{1}{4} :(5* \frac{12}{25}- \frac{3}{4} )=$
[tex]=[ \frac{3+4+5}{6}*\frac{7}{12} -\frac{1}{3} ]* \frac{1}{4} :(\frac{12}{5}- \frac{3}{4} )= [/tex]
=$=[ \frac{12}{6}*\frac{7}{12} -\frac{1}{3} ]* \frac{1}{4} :(\frac{48-15}{20} )=$
=$=[ \frac{7}{6} -\frac{1}{3} ]* \frac{1}{4} :(\frac{33}{20} )=$
=$=[ \frac{7-2}{6}]* \frac{1}{4}*(\frac{20}{33} )=$
=[tex]= \frac{5}{6}*\frac{5}{33} [/tex]
=$\frac{25}{198}$