[tex]f)- \frac{5}{4} + \frac{3}{11} - \frac{9}{22} =- \frac{55}{44} + \frac{12}{44} - \frac{18}{44}=- \frac{61}{44} \\ g) \frac{3}{8} + \frac{1}{4} - \frac{4}{5}= \frac{15}{40} + \frac{10}{40}- \frac{32}{40}=- \frac{7}{40}.[/tex][tex]2.a) \frac{1}{2}+ \frac{2}{5} = \frac{5}{10} + \frac{4}{10} = \frac{9}{10} \\ b) \frac{2}{7} - \frac{1}{9} = \frac{18}{63} - \frac{7}{63} = \frac{11}{63} \\ c) \frac{1}{1} - \frac{7}{9} = \frac{9}{9} - \frac{7}{9} = \frac{2}{9} \\ d) \frac{7}{5} + \frac{3}{4} - \frac{11}{20}= \frac{28}{20} + \frac{15}{20} - \frac{11}{20} = \frac{32}{20} (:4)= \frac{8}{5} \\ e) \frac{1}{2}+ \frac{1}{3} + \frac{1}{5}= \frac{15}{30} + \frac{10}{30}+ \frac{6}{30} = \frac{31}{30} \\ [/tex]
