\[\boxed{\mathbf{1013\ (1004)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1) - 27 + 13 - 34 + 21 =\]
\[= 34 - 61 = - 27\]
\[2)\ 1,7 - 3,4 - 2,5 + 4,1 =\]
\[= 5,8 - 5,9 = - 0,1\]
\[3) - 0,65 - ( - 0,44) +\]
\[+ ( - 1,23) + 8,1 = - 0,65 +\]
\[+ 0,44 - 1,23 + 8,1 =\]
\[= 8,54 - 1,88 = 6,66\]
\[4)\ 3\frac{1}{6} + \left( - 2\frac{4}{9} \right) - \left( - 1\frac{2}{3} \right) =\]
\[= 3\frac{3}{18} - 2\frac{8}{18} + 1\frac{12}{18} =\]
\[= 4\frac{15}{18} - 2\frac{8}{18} = 2\frac{7}{18}\]
\[5)\ 4\frac{5}{9} + \left( - 5\frac{7}{12} \right) - \left( - 2\frac{1}{6} \right) -\]
\[- 1\frac{1}{3} + 3\frac{3}{4} + \left( - \frac{13}{18} \right) =\]
\[= 4\frac{20}{36} - 5\frac{21}{36} + 2\frac{6}{36} - 1\frac{12}{36} +\]
\[+ 3\frac{27}{36} - \frac{26}{36} = 9\frac{53}{36} - 6\frac{59}{36} =\]
\[= 10\frac{17}{36} - 7\frac{23}{36} = 2\frac{30}{36} = 2\frac{5}{6}\]