Explicație pas cu pas:
[tex] \frac{5}{9} + \frac{12 - 1}{90} + \frac{5}{9} + \frac{12 - 1}{90} = \\ \frac{5}{9} + \frac{11}{90} + \frac{5}{9} + \frac{11}{90} \\ = \frac{5 + 5}{9} + \frac{11 + 11}{90} = \frac{10}{9} + \frac{22}{90} = \\ \frac{100 + 22}{90} = \frac{122}{90} = \frac{61}{45} [/tex]
