1. \(-\frac{1}{2} + ( -\frac{3}{2}) = -\frac{1}{2} - \frac{3}{2} = -\frac{4}{2} = -2\).
2. \(-160 - 14 = -174\).
3. \(-4 \frac{3}{5} - 2 \frac{7}{10} = -\frac{23}{5} - \frac{27}{10} = -\frac{46}{10} - \frac{27}{10} = -\frac{73}{10} = -7.3\).
4. \(-24 + (-(-(-89))) = -24 + (-89) = -24 - 89 = -113\).