Question

7/15+(2/15+1/5),3/16+(1/16+5/8),(1/13+1/14)+12/13 пж срочно

Answer 1

Пошаговое объяснение:

$\frac{7}{15} + ( \frac{2}{15} + \frac{1}{5} ) = \frac{7}{15} + ( \frac{2}{15} + \frac{6}{15} ) = \frac{7}{15} + \frac{8}{15} = \frac{15}{15} = 1$

$\frac{3}{16} + ( \frac{1}{16} + \frac{5}{8} ) = \frac{3}{16} + ( \frac{1}{16} + \frac{10}{16} ) = \frac{3}{16} + \frac{11}{16} = \frac{14}{16} = \frac{7}{8}$

(1/13+1/14)+12/13=( 14/(13×14)+13/(14×13) )+12/13= 27/182 +(12×14)/(13×14) = 27/182 + 168/182= 195/182= 15/14