Explicație pas cu pas:
[tex] \frac{21}{10} - \frac{9}{10} - \frac{7}{10} = \frac{5}{10} = \frac{1}{2} [/tex]
[tex] \frac{27}{26} - \frac{11}{26} - \frac{3}{26} = \frac{13}{26} = \frac{1}{2} [/tex]
[tex] \frac{35}{24} - \frac{19}{24} - \frac{5}{12} = \frac{35 - 19 - 10}{24} = \frac{6}{24} = \frac{1}{4} [/tex]
