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)

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