4. Вычислите: 1) |-5,7| + |-2,5| - |-4,32|; 2) $$\frac{5}{42} : 1 \frac{1}{2} - 1 \frac{1}{3}$$

1) |-5,7| + |-2,5| - |-4,32| = 5,7 + 2,5 - 4,32 = 8,2 - 4,32 = **3,88** 2) $$\frac{5}{42} : 1 \frac{1}{2} - 1 \frac{1}{3} = \frac{5}{42} : \frac{3}{2} - \frac{4}{3} = \frac{5}{42} \cdot \frac{2}{3} - \frac{4}{3} = \frac{10}{126} - \frac{4}{3} = \frac{5}{63} - \frac{4}{3} = \frac{5}{63} - \frac{84}{63} = -\frac{79}{63} = -1 \frac{16}{63}$$. **Ответ: $$-1 \frac{16}{63}$$**