Давай вычислим значение каждого выражения по порядку. Начнем!
\[\frac{2}{15} + (-\frac{3}{10}) = \frac{2}{15} - \frac{3}{10} = \frac{4}{30} - \frac{9}{30} = -\frac{5}{30} = -\frac{1}{6}\]
\[-\frac{2}{3} + \frac{13}{15} = -\frac{10}{15} + \frac{13}{15} = \frac{3}{15} = \frac{1}{5}\]
\[\frac{13}{16} + (-\frac{9}{32}) = \frac{13}{16} - \frac{9}{32} = \frac{26}{32} - \frac{9}{32} = \frac{17}{32}\]
\[-4\frac{5}{9} + (-\frac{7}{6}) = -4\frac{5}{9} - \frac{7}{6} = -\frac{41}{9} - \frac{7}{6} = -\frac{82}{18} - \frac{21}{18} = -\frac{103}{18} = -5\frac{13}{18}\]
\[-5\frac{7}{8} + (-\frac{6}{10}) = -5\frac{7}{8} - \frac{3}{5} = -\frac{47}{8} - \frac{3}{5} = -\frac{235}{40} - \frac{24}{40} = -\frac{259}{40} = -6\frac{19}{40}\]
\[-5\frac{13}{18} + 12\frac{11}{12} = -\frac{103}{18} + \frac{155}{12} = -\frac{206}{36} + \frac{465}{36} = \frac{259}{36} = 7\frac{7}{36}\]
\[-13 + 7\frac{3}{16} = -13 + \frac{115}{16} = -\frac{208}{16} + \frac{115}{16} = -\frac{93}{16} = -5\frac{13}{16}\]
\[-2\frac{3}{8} + (-1\frac{5}{9}) = -2\frac{3}{8} - 1\frac{5}{9} = -\frac{19}{8} - \frac{14}{9} = -\frac{171}{72} - \frac{112}{72} = -\frac{283}{72} = -3\frac{67}{72}\]
\[-8 + \frac{5}{22} = -\frac{176}{22} + \frac{5}{22} = -\frac{171}{22} = -7\frac{17}{22}\]
\[-2\frac{9}{20} + 5\frac{7}{30} = -\frac{49}{20} + \frac{157}{30} = -\frac{147}{60} + \frac{314}{60} = \frac{167}{60} = 2\frac{47}{60}\]
\[-5\frac{1}{4} + 1\frac{3}{8} = -\frac{21}{4} + \frac{11}{8} = -\frac{42}{8} + \frac{11}{8} = -\frac{31}{8} = -3\frac{7}{8}\]
\[4\frac{3}{7} + (-8\frac{9}{14}) = \frac{31}{7} - \frac{121}{14} = \frac{62}{14} - \frac{121}{14} = -\frac{59}{14} = -4\frac{3}{14}\]
Ответ: 1) -\frac{1}{6}; 2) \frac{1}{5}; 3) \frac{17}{32}; 4) -5\frac{13}{18}; 5) -6\frac{19}{40}; 6) 7\frac{7}{36}; 7) -5\frac{13}{16}; 8) -3\frac{67}{72}; 9) -7\frac{17}{22}; 10) 2\frac{47}{60}; 11) -3\frac{7}{8}; 12) -4\frac{3}{14}.
Молодец! Ты отлично справился с вычислениями. Не останавливайся на достигнутом, и все у тебя получится!