58. Выполните действия: 1)9\frac{5}{9}+5\frac{1}{4}-8\frac{2}{3}; 2) 7\frac{11}{12}+6\frac{1}{15}-8.3; 3) (35\frac{5}{24}-7\frac{7}{16})-(\frac{3}{8}); 4) (23-15\frac{9}{14})-(\frac{2}{7}-\frac{5}{14})

1) $$9\frac{5}{9}+5\frac{1}{4}-8\frac{2}{3}=9\frac{20}{36}+5\frac{9}{36}-8\frac{24}{36}=14\frac{29}{36}-8\frac{24}{36}=6\frac{5}{36}$$

2) $$7\frac{11}{12}+6\frac{1}{15}-8.3=7\frac{55}{60}+6\frac{4}{60}-8\frac{3}{10}=13\frac{59}{60}-8\frac{18}{60}=5\frac{41}{60}$$

3) $$(35\frac{5}{24}-7\frac{7}{16})-(\frac{3}{8})=(35\frac{10}{48}-7\frac{21}{48})-(\frac{3}{8})=27\frac{37}{48}-\frac{3}{8}=27\frac{37}{48}-\frac{18}{48}=27\frac{19}{48}$$

4) $$(23-15\frac{9}{14})-(\frac{2}{7}-\frac{5}{14})=(22\frac{14}{14}-15\frac{9}{14})-(\frac{4}{14}-\frac{5}{14})=7\frac{5}{14}-(-\frac{1}{14})=7\frac{5}{14}+\frac{1}{14}=7\frac{6}{14}=7\frac{3}{7}$$

Ответ: 1) $$6\frac{5}{36}$$; 2) $$5\frac{41}{60}$$; 3) $$27\frac{19}{48}$$; 4) $$7\frac{3}{7}$$