Question

найдите значение выражения: (-2,04÷1/25-3,61: (-19/40)): (-2 целых 4/5)+ 0,6÷ (-0,9)

Answer 1

$(- \frac{51}{25}: \frac{1}{25}- \frac{361}{100}:(- \frac{19}{40})):(- \frac{14}{5})+ \frac{6}{10}:(- \frac{9}{10})=$
=$(- \frac{51}{1}- \frac{361}{100}*(- \frac{40}{19})):(- \frac{14}{5})+ \frac{6}{10}*(- \frac{10}{9})=$
=$(- \frac{51}{1}+ \frac{19*2}{5})):(- \frac{14}{5})- \frac{2}{3}=$
=$(- \frac{225}{5}+ \frac{38}{5})):(- \frac{14}{5})- \frac{2}{3}=- \frac{217}{5}:(- \frac{14}{5})- \frac{2}{3}=$
=$\frac{217}{5}* \frac{5}{14} - \frac{2}{3}= \frac{31}{2}- \frac{2}{3}= \frac{93}{6}- \frac{4}{6}= \frac{89}{6}=14 \frac{5}{6}$