Bonjour,

Réponse :

1.

[tex]A = \frac{-5}{2}+\frac{10}{6} \\A = \frac{-5\times3+10}{6}\\A = \frac{-15+10}{6}\\\boxed{A = -\frac{5}{6}}[/tex]

2.

[tex]B = \frac{4}{5}+\frac{2}{25} \\ B = \frac{4\times5+2}{25} \\ B = \frac{20+2}{25} \\\boxed{ B = \frac{22}{25} }[/tex]
3.

[tex]C = 1+ \frac{3}{11}\\ C = \frac{11+3}{11} \\\boxed{ C = \frac{14}{11} }[/tex]

4.

[tex]D = 3-\frac{7}{9} \\D = \frac{27}{9} -\frac{7}{9} \\\boxed{D = \frac{20}{9} }[/tex]

5.

[tex]E = 3,25+\frac{1}{8} \\E = \frac{26}{8} +\frac{1}{8} \\\boxed{E = \frac{27}{8}}[/tex]

6.

[tex]F = \frac{-5}{8}-1,5\\F = \frac{-5}{8}-\frac{12}{8} \\F = \frac{-5-12}{8} \\\boxed{F = -\frac{17}{8} }[/tex]

En espérant t'avoir aidé, bonne continuation ! :)