Réponse:
[tex]a = \frac{2}{3} \times \frac{9}{16} - \frac{1}{16} \\ = \frac{2 \times 3 \times 3}{3 \times 2 \times 8} - \frac{1}{16} \\ = \frac{3}{8} - \frac{1}{16} = \frac{6 - 1}{16} = \frac{5}{16} [/tex]
[tex]b = \frac{7}{5} \times \frac{3}{2} - \frac{3}{2} = \frac{21}{10} - \frac{3}{2} = \frac{18}{10} = \frac{9}{5} [/tex]
[tex]c = \frac{3}{5} + \frac{1}{5} \times \frac{2}{3} = \frac{3}{5} + \frac{2}{15} = \frac{9 + 2}{15} = \frac{11}{15} [/tex]
