Răspuns:
[tex] \frac{11}{16} + \frac{13}{14} - \frac{11}{12} = \frac{11 \times 21}{16 \times 21} + \frac{13 \times 24}{14 \times 24} - \frac{11 \times 28}{12 \times 28} = \frac{231}{336} + \frac{312}{336} - \frac{308}{336} = \frac{231 + 312 - 308}{336} = \frac{543 - 308}{336} = \frac{235}{336} [/tex]
[tex] \frac{10}{11} - \frac{5}{22} - \frac{1}{2} = \frac{10 \times 2}{11 \times 2} - \frac{5}{22} - \frac{1 \times 11}{2 \times 11} = \frac{20}{22} - \frac{5}{22} - \frac{11}{22} = \frac{20 - 5 - 11}{22} = \frac{20 - 16}{22} = \frac{4}{22} simplifici \: prin \: 2 = \frac{2}{11} [/tex]
