~cuplăcere~
~Este verificat și corect~
[tex]a) \frac{1}{5} - \frac{1}{4} = - \frac{1}{20} [/tex]
[tex]b ) \frac{3}{7} - \frac{2}{11} = \frac{19}{77} [/tex]
[tex]c) \frac{3}{8} - \frac{5}{6} = - \frac{11}{24} [/tex]
[tex]d) \frac{5}{9} - \frac{3}{4} = - \frac{7}{36} [/tex]
[tex]e) \frac{7}{15} - \frac{5}{14} = \frac{23}{210} [/tex]
[tex]f) \frac{5}{6} - \frac{3}{20} = \frac{41}{60} [/tex]
