pomóżcie daje najjj na jutro moi jest potrzebne to zadanie

Zadanie 7. a) [latex](1 frac{3}{4}- frac{11}{20})*(2 frac{1}{2}-1 frac{7}{18})=( frac{7}{4}- frac{11}{20})*( frac{5}{2}- frac{25}{18})= (frac{35}{20}- frac{11}{20})*( frac{45}{18}- frac{25}{18})[/latex][latex]= frac{24}{20}* frac{20}{18}= frac{480}{360}=1 frac{120}{360}=1 frac{1}{3} [/latex] b) [latex](3 frac{1}{2}-1 frac{1}{6})*(1 frac{3}{7}- frac{11}{14})=( frac{7}{2}- frac{7}{6})*( frac{10}{7}- frac{11}{14})=( frac{21}{6}- frac{7}{6})*( frac{20}{14}- frac{11}{14}) [/latex][latex]= frac{14}{6}* frac{9}{14}= frac{126}{84}=1 frac{42}{84}=1 frac{1}{2} [/latex] c) [latex](3 frac{2}{5}-3 frac{2}{35})*(1 frac{1}{18}+ frac{1}{2})=( frac{17}{5}- frac{107}{35})*( frac{19}{18}+ frac{1}{2})=( frac{119}{35} - frac{107}{35} )*( frac{19}{18}+ frac{9}{18}) [/latex][latex]= frac{12}{35}* frac{28}{18}= frac{336}{630} [/latex] d) [latex](1 frac{1}{3}-1 frac{2}{9})*(1 frac{4}{5}+ frac{9}{10})=( frac{4}{3}- frac{11}{9})*( frac{9}{5}+ frac{9}{10})=( frac{12}{9} - frac{11}{9})*( frac{18}{10}+ frac{9}{10}) [/latex][latex]= frac{1}{9}* frac{27}{10}= frac{27}{90} [/latex] e) [latex](1 frac{3}{4}+ frac{1}{8})*(3 frac{3}{10}-2 frac{29}{50})=( frac{7}{4}+ frac{1}{8})*( frac{33}{10}- frac{129}{50})=( frac{14}{8} + frac{1}{8})*( frac{165}{50} - frac{129}{50}) [/latex][latex]= frac{15}{8}* frac{36}{50}= frac{540}{400}=1 frac{140}{400}=1 frac{7}{20} [/latex] f) [latex](1 frac{1}{2}+2 frac{1}{10})*(2 frac{1}{2}-1 frac{3}{7})=( frac{3}{2}+ frac{21}{10})*( frac{5}{2}- frac{10}{7})=( frac{15}{10} + frac{21}{10})*( frac{35}{14} - frac{20}{14}) [/latex][latex]= frac{36}{10}* frac{15}{14}= frac{540}{140}=3 frac{120}{140}=3 frac{12}{14} [/latex]