1. Выполните действия: a) - 3,8-5,7; б) - 8,4 + 3,7; в) 3,9-8,4; г) -2,9+7,3; д) -$$\frac{2}{9}$$ + $$\frac{5}{6}$$; e) -1$$\frac{3}{4}$$-2$$\frac{1}{12}$$

a) -3.8 - 5.7 = -9.5 б) -8.4 + 3.7 = -4.7 в) 3.9 - 8.4 = -4.5 г) -2.9 + 7.3 = 4.4 д) -$$\frac{2}{9}$$ + $$\frac{5}{6}$$ = -$$\frac{4}{18}$$ + $$\frac{15}{18}$$ = $$\frac{11}{18}$$ e) -1$$\frac{3}{4}$$-2$$\frac{1}{12}$$ = -$$\frac{7}{4}$$ - $$\frac{25}{12}$$ = -$$\frac{21}{12}$$ - $$\frac{25}{12}$$ = -$$\frac{46}{12}$$ = -$$\frac{23}{6}$$ = -3$$\frac{5}{6}$$