Question

Помогите решить !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

1) $(frac{7}{15} - frac{1}{6}) + frac{2}{5} = frac{14}{30} - frac{5}{30} = frac{9}{30} + frac{2}{5} = frac{9}{30} + frac{12}{30} = frac{21}{30} = frac{7}{10} = 0,7$

НОЗ: 30, 30.

2) $(frac{3}{8} - frac{1}{9}) + frac{25}{36} = frac{27}{72} - frac{8}{72} = frac{19}{72} + frac{25}{36} = frac{19}{72} + frac{50}{72} = frac{69}{72}$

НОЗ: 72.

3) $(frac{8}{9} - frac{5}{6}) + frac{2}{3} = frac{16}{18} - frac{15}{18} = frac{1}{18} + frac{2}{3} = frac{1}{18} + frac{12}{18} = frac{13}{18}$

НОЗ: 18.

4) $(frac{7}{8} - frac{13}{20} + frac{9}{10} = frac{35}{40} - frac{26}{40} = frac{9}{40} + frac{9}{10} = frac{9}{40} + frac{36}{40} = frac{45}{40} = 1frac{5}{40}$

НОЗ: 40.

5) $(frac{7}{18} - frac{1}{12}) + frac{5}{6} = frac{14}{36} - frac{3}{36} = frac{11}{36} + frac{30}{36} = frac{41}{36} = 1frac{5}{36}$

НОЗ: 36.

6) $(frac{3}{4} - frac{8}{15}) + frac{17}{20} = frac{x}{y} = frac{45}{60} - frac{32}{60} = frac{13}{60} + frac{51}{60} = frac{64}{60} = 1frac{4}{60}$

НОЗ: 60.