т) $$-5\frac{2}{5} + 4\frac{1}{3}$$

$$-5\frac{2}{5} + 4\frac{1}{3} = -\frac{27}{5} + \frac{13}{3} = -\frac{27 \cdot 3}{5 \cdot 3} + \frac{13 \cdot 5}{3 \cdot 5} = -\frac{81}{15} + \frac{65}{15} = \frac{-81+65}{15} = \frac{-16}{15} = -1\frac{1}{15}$$ Ответ: $$-1\frac{1}{15}$$