Bonjour,
[tex]D = 2-\frac{7}{5}\\\\D = \frac{2}{1} -\frac{7}{5}\\\\D = \frac{2*5}{1*5} -\frac{7}{5}\\\\D = \frac{10}{5} -\frac{7}{5}\\\\D = \frac{3}{5}[/tex]
[tex]E = \frac{4}{15} - (-\frac{7}{25})\\\\E = \frac{4}{15} +\frac{7}{25}\\\\E = \frac{4*5}{15*5} +\frac{7*3}{25*3}\\\\E = \frac{20}{75} +\frac{21}{75}\\\\E = \frac{41}{75}[/tex]
[tex]F = \frac{1}{4}+\frac{3}{8}+\frac{5}{6} \\\\F = \frac{1*6}{4*6}+\frac{3*3}{8*3}+\frac{5*4}{6*4}\\\\F = \frac{6}{24}+\frac{9}{24}+\frac{20}{24}\\\\F = \frac{35}{24}[/tex]
J’espère t’avoir aidé.
Si tu as des questions n’hésites pas à me les demander.
Bonne journée et bonne continuation.
