2.
а) |-3,8|+|-6,3| = 3,8 + 6,3 = 10,1
б) |-5,44|:|3,2| = 5,44 : 3,2 = 1,7
в) |-5 \frac{1}{6}| - |-1 \frac{5}{12}| = 5 \frac{1}{6} - 1 \frac{5}{12} = \frac{31}{6} - \frac{17}{12} = \frac{62}{12} - \frac{17}{12} = \frac{45}{12} = \frac{15}{4} = 3 \frac{3}{4} = 3,75