Question

решите пожалуйста)))))

Answer 1

Числитель:
$1) 13 \frac{2}{7} -15= 13 \frac{2}{7} -14 -1=13 \frac{2}{7}-13 \frac{7}{7} -1=- \frac{5}{7} -1=-1 \frac{5}{7} \\ 2) -1\frac{5}{7} * 1,75= -\frac{12}{7} *1 \frac{3}{4}= -\frac{12}{7}*\frac{7}{4}=-3\\\\3)9\frac{5}{8} - 11,75 =9 \frac{5}{8}-11 \frac{3}{4} = 9 \frac{5}{8}-11 \frac{6}{8} = -(11 \frac{6}{8}-9 \frac{5}{8})=-2 \frac{1}{8} \\ 4)-2 \frac{1}{8}:0,75=-\frac{17}{8}:\frac{3}{4}=-\frac{17}{8}:\frac{4}{3}=-\frac{17}{6} \\ \\5)-3- \frac{17}{6} =-3-2- \frac{5}{6}=- 5\frac{5}{6}$

Знаменатель:
$5)-12: 1\frac{5}{7} = -12: \frac{12}{7} =-12*\frac{7}{12} =-7 \\ 6)-7+4 \frac{2}{3} =-2 \frac{1}{3}$


Ответ:

$-5 \frac{5}{6} : (-2 \frac{1}{3}) = \frac{35}{6} : \frac{7}{3} = \frac{35}{6}* \frac{3}{7} = \frac{5}{2}$