A=6-2×4/5. B=15/8 × 9/2 c= 7/6 + 4/3 ÷ 8- 4/3 Merci

Bonjour,

[tex]A=6-2\times\dfrac{4}{5}\\\\A=6-\dfrac{8}{5}\\\\A=\dfrac{30}{5}-\dfrac{8}{5}\\\\\boxed{A=\dfrac{22}{5}}\\\\B=\dfrac{15}{8}\times\dfrac{9}{2}\\\\B=\dfrac{15\times9}{8\times2}\\\\\boxed{B=\dfrac{135}{16}}[/tex]


[tex]C= \dfrac{7}{6} + \dfrac{\dfrac{4}{3}}{8}- \dfrac{4}{3}\\\\C= \dfrac{7}{6} + \dfrac{\dfrac{4}{3}}{\dfrac{8}{1}}- \dfrac{4}{3}\\\\C= \dfrac{7}{6} + \dfrac{4}{3}\times\dfrac{1}{8}- \dfrac{4}{3} \\\\C= \dfrac{7}{6} + \dfrac{1}{3}\times\dfrac{1}{2}- \dfrac{4}{3}\\\\C= \dfrac{7}{6} + \dfrac{1}{6}- \dfrac{4}{3}\\\\C= \dfrac{7}{6} + \dfrac{1}{6}- \dfrac{8}{6}\\\\\boxed{C= 0} [/tex]