б) 26 - 39 = -13
г) -14,7 - 17,4 = -32,1
е) \(-\frac{11}{12}-\frac{8}{9} = -\frac{33}{36}-\frac{32}{36} = -\frac{65}{36} = -1\frac{29}{36}\)
з) \(3\frac{7}{12}-2\frac{5}{8} = 3\frac{14}{24}-2\frac{15}{24} = \frac{41}{24}-\frac{63}{24} = \frac{23}{24}\)
Ответ: б) -13; г) -32,1; е) \(-1\frac{29}{36}\); з) \(\frac{23}{24}\)