4. Вычислите: 1) |-3,21| + |-1,91| - |2,25|; 2) |$$\frac{17}{-48}$$| : |$$\frac{5}{-26}$$|.

1) |-3,21| + |-1,91| - |2,25| = 3,21 + 1,91 - 2,25 = 5,12 - 2,25 = 2,87 2) |$$\frac{17}{-48}$$| : |$$\frac{5}{-26}$$| = $$\frac{17}{48} : \frac{5}{26} = \frac{17}{48} * \frac{26}{5} = \frac{17 * 13}{24 * 5} = \frac{221}{120}$$ = 1 $$\frac{101}{120}$$