Răspuns:
Explicație pas cu pas:
e) 1-{[tex]\frac{1}{2}-[\frac{1}{3}-(\frac{1}{3} -\frac{1}{5} )][/tex]}=
= [tex]1-[\frac{1}{2}-(\frac{1}{3}-\frac{2}{15})]=1-(\frac{1}{2}-\frac{3}{15})=1-\frac{15-9}{30}=1-\frac{6}{30} =1-\frac{1}{5}=\frac{4}{5}[/tex]
f) {[tex]\frac{1}{2}+[\frac{3}{4}-(\frac{1}{5} +\frac{1}{6} )-\frac{1}{5} }]+\frac{3}{4}[/tex]} - [tex]\frac{1}{12}[/tex]= [tex][\frac{1}{2} +(\frac{3}{4} -\frac{11}{30} -\frac{1}{5} )+\frac{3}{4} ]-\frac{1}{12}=(\frac{1}{2} +\frac{45-22-12}{60} +\frac{3}{4} )-\frac{1}{12} =(\frac{1}{2} +\frac{11}{60} +\frac{3}{4} )-\frac{1}{12} = \frac{30+11+45}{60} -\frac{1}{12} =\frac{86}{60} -\frac{1}{12}=\frac{86-5}{60}=\frac{81}{60}=\frac{27}{20}[/tex]
