Question

решите срочно по действиям 20баллов

Answer 1

Ответ:

Пошаговое объяснение:

$1) (-3\frac{1}{4} + 2\frac{1}{6})*(-2\frac{2}{11})-(-\frac{5}{6}+1\frac{3}{5})*(-\frac{4}{5}-1.2)=\\= (2\frac{2}{12}-3\frac{3}{12})*(-2\frac{2}{11})-(1\frac{18}{30}-\frac{25}{30})*(-\frac{8}{10}-\frac{12}{10})=\\=(-1\frac{1}{12})*(-2\frac{2}{11})-(\frac{23}{30})*-2=\\=-\frac{13}{12}*(-\frac{24}{11}) + \frac{46}{30} = \\= \frac{312}{132}+\frac{46}{30} = \frac{1560}{660} + \frac{1012}{660} = \frac{2572}{660} = \frac{643}{165} = \frac{148 + 3*165}{165} = 3\frac{148}{165}$