Question

решите срочно по действиям 20баллов

Answer 1

Ответ:

Пошаговое объяснение:

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