Ответ:
- \(\frac{7}{10}+\frac{2}{9}=\frac{63}{90}+\frac{20}{90}=\frac{83}{90}\).
- \(\frac{19}{36}-\frac{5}{12}=\frac{19}{36}-\frac{15}{36}=\frac{4}{36}=\frac{1}{9}\).
- \(\frac{15}{16}-\frac{7}{24}=\frac{45}{48}-\frac{14}{48}=\frac{31}{48}\).
- \(\frac{9}{28}+\frac{5}{21}=\frac{27}{84}+\frac{20}{84}=\frac{47}{84}\).
- \(\frac{11}{18}-\frac{5}{12}=\frac{22}{36}-\frac{15}{36}=\frac{7}{36}\).
- \(\frac{7}{8}-\frac{3}{4}+\frac{5}{16}=\frac{14}{16}-\frac{12}{16}+\frac{5}{16}=\frac{7}{16}\).
