4. Вычислите: 1) (-5,71+12,51-14,321) 2) $$\frac{6}{42}:1\frac{1}{4}.$$

1) $$-5.71 + 12.51 - 14.32 = 6.8 - 14.32 = -7.52$$ 2) $$\frac{6}{42} : 1\frac{1}{4} = \frac{6}{42} : \frac{5}{4} = \frac{6}{42} \cdot \frac{4}{5} = \frac{1}{7} \cdot \frac{4}{5} = \frac{4}{35}$$ Ответ: 1) **-7.52**, 2) **$$\frac{4}{35}$$**