Svp aidez moi a faire :A: 1sur8-3sur8×24sur15 B:7sur6+11sur3:4sur5 Merci et il faut simplifier le resultat au maximum.

Bonjour,

A = 1/8 - 3/8 x 24/15
A = 1/8 - 72/120
A = 1 x 15 / 8 x 15 - 72/120
A = 15/120 - 72/120
A = - 57/120
A = 3 x - 19 / 3 x 40
A = - 19/40

B = 7/6 + 11/3 : 4/5
B = 7/6 + 11/3 x 5/4
B = 7/6 + 55/12
B = 7 x 2 / 6 x 2 + 55/12
B = 14/12 + 55/12
B = 69/12
B = 3 x 23 / 3 x 4
B = 23/4