1)1\5-3\5= 2)1\2-1\3= 3)1\9-2\3+1\6= 4)-0.6+2.7 5)0.6-2-3.4= 6)-0.6+3.7= 7)-0.27+3.5 8)-2.5+(3.3-8.2)= 9)3 2\5-5 1\2= 10)-3 1\2+1\9 11)-7 1\3-1 1\2

$\frac{1}{5} - \frac{3}{5} = \frac{1 - 3}{5} = \frac{-2}{5} = -0.4$

$\frac{1}{2} - \frac{1}{3} = \frac{3}{6} - \frac{2}{6} = \frac{1}{6}$

$\frac{1}{9} - \frac{2}{3} + \frac{1}{6} = \frac{1}{9} - \frac{6}{9} + \frac{3}{18} = \frac{1 - 6 + 1}{18} = \frac{-4}{18} = -\frac{2}{9}$

$-0.6 + 2.7 = 2.1$

$0.6 - 2 - 3.4 = 0.6 - 5.4 = -4.8$

$-0.6 + 3.7 = 3.1$

$-0.27 + 3.5 = 3.23$

$-2.5 + (3.3 - 8.2) = -2.5 + (-4.9) = -7.4$

$3 \frac{2}{5} - 5 \frac{1}{2} = \frac{17}{5} - \frac{11}{2} = \frac{34}{10} - \frac{55}{10} = \frac{-21}{10} = -2.1$

$-3 \frac{1}{2} + \frac{1}{9} = -\frac{7}{2} + \frac{1}{9} = \frac{-63}{18} + \frac{2}{18} = \frac{-61}{18}$

$-7 \frac{1}{3} - 1 \frac{1}{2} = -\frac{22}{3} - \frac{3}{2} = \frac{-44}{6} - \frac{9}{6} = \frac{-53}{6}$