2. a) |-5,6| + |-4,2| = 5,6 + 4,2 = 9,8.
б) |-5,04| : |3,6| = 5,04 : 3,6 = 1,4.
в) |-3\frac{7}{11}| - |-1\frac{15}{22}| = |-\frac{40}{11}| - |-\frac{37}{22}| = \frac{40}{11} - \frac{37}{22} = \frac{80}{22} - \frac{37}{22} = \frac{43}{22} = 1\frac{21}{22}.