Question

Решите пожалуйста дам 30 баллов номер 584

Answer 1

Ответ:

а) $\frac{3}{4} \times \frac{1}{2} + \frac{1}{20} \times \frac{1}{2} = \frac{3}{8} + \frac{1}{40} = \frac{15}{40} + \frac{1}{40} = \frac{16}{40} = \frac{4}{10} = \frac{2}{5}$

б) $( \frac{7}{12} - \frac{4}{12} ) \times \frac{16}{19} = \frac{3}{12} \times \frac{16}{19} = \frac{1}{4} \times \frac{16}{19} = \frac{4}{19}$

в) $(7 \frac{9}{15} - 2 \frac{4}{15} ) \times \frac{9}{32} = 5 \frac{5}{15} \times \frac{9}{32} = 5 \frac{1}{3} \times \frac{9}{32} = \frac{16}{3} \times \frac{9}{32} = \frac{3}{2} = 1 \frac{1}{2}$

г) $(\frac{11}{24} + \frac{4}{24} ) \times \frac{8}{5} = \frac{15}{24} \times \frac{8}{5} = 1$