4sur5 fois7sur6-11sur10fois 5sur 6

4/5 x 7/6 - 11/10 x 5/6
= 28/30 - 55/60
= 56/60 - 55/60
= 1/60

[tex]\frac{4}{5}* \frac{7}{6} - \frac{11}{10} * \frac{5}{6} \\ =\frac{2}{5}* \frac{7}{3} - \frac{11}{2} * \frac{1}{6} \\ =\frac{14}{15} - \frac{11}{12} \\ = \frac{56}{60} - \frac{55}{60} \\ = \frac{1}{60} [/tex]