2 3/4: (1 1/2 - 2/5)+(3/4+5/6):3 1/6 СРОЧНО, МНОГО БАЛЛОВ!!!

$1) 1 \frac{1}{2} - \frac{2}{5} = 1\frac{5}{10} - \frac{4}{10} =1 \frac{1}{10} \\ 2) \frac{3}{4} + \frac{5}{6} = \frac{9}{12} + \frac{10}{12} = \frac{19}{12} \\ 3)2 \frac{3}{4} : 1\frac{1}{10} = \frac{11}{4} : \frac{11}{10} = \frac{11}{4}* \frac{10}{11}= \frac{5}{2} =2 \frac{1}{2} \\ 4) \frac{19}{12} :3 \frac{1}{6} =\frac{19}{12} : \frac{19}{6} =\frac{19}{12} * \frac{6}{19} = \frac{1}{2} \\ 5)2 \frac{1}{2} + \frac{1}{2} =3$

Ответ: 3