Question

ПЖ ДАМ 40 БАЛЛОВ НОМЕР 852 Д Е 853 Г Д Е

Answer 1

Ответ:

852 Е)

$\frac{1}{12 } + \frac{1}{18} + \frac{1}{12}$

$\frac{1}{12} + \frac{1}{18} = \frac{1 \times 3}{12 \times 3} + \frac{1 \times 2}{18 \times 2} = \frac{3}{36} + \frac{2}{36} = \frac{5}{36}$

$\frac{5}{36} + \frac{1}{12} = \frac{5 \times 1}{36 \times 1} + \frac{1 \times 3}{12 \times 3} = \frac{5}{36} + \frac{3}{36} = \frac{8}{36} = \frac{2}{9} = 0.222$

Д)

$\frac{7}{10} + \frac{2}{15} + \frac{11}{30} = \frac{11}{30} = 1 \frac{1}{5} = 1.2$

853. Г)

$\frac{7}{15} + ( \frac{2}{15} + \frac{1}{5} ) = \frac{12}{15} = \frac{4}{5} = 0.8$

Д)

$\frac{3}{16} + ( \frac{1}{16} + \frac{5}{8} ) = \frac{14}{16} = \frac{7}{8} = 0.875$

Е)

$( \frac{1}{13} + \frac{1}{14} ) + \frac{12}{13} = \frac{195}{182} = \frac{15}{14} = 1 \frac{1}{14} = 1.07$