[tex]\displaystyle 1,1(6)-0,5+1,25-0,(6)-2,25= \\ \\ = \frac{116-11}{90} - \frac{5}{10} + \frac{125}{100} - \frac{6}{9} - \frac{225}{100} = \frac{105}{90} - \frac{5}{10} + \frac{125}{100} - \frac{6}{9} - \frac{225}{100} = \\ \\ = \frac{1050}{900} - \frac{450}{900} + \frac{1125}{900}- \frac{600}{900} - \frac{2025}{900} =- \frac{900}{900} =-1[/tex]
