Bonjour
♧1. On a :
[tex] \frac {4}{3} - \frac {4}{3} * \frac {27}{24} [/tex]
--> la multiplication est prioritaire + ( simplification )...
[tex] = \frac {4}{3} - \frac {4}{3} * \frac {9}{8} [/tex]
[tex] = \frac {4}{3} - \frac {4*3*3}{3*2*4} [/tex]
[tex] = \frac {4}{3} - \frac {3}{2} [/tex]
[tex] = \frac {8}{6} - \frac {9}{6} [/tex]
[tex] = - \frac {1}{6} [/tex]
♧2. On a 1h 30 = 1,5 h d'où d = 12×1,5 = 18 km
Voilà ^^
