Bonsoir j’ai un DM pour demain svp

A = 7/2 * 5/2 = 35/4
B = -1/5 * 7/6 = -7/30

A = 8/5 : 4/3 = 8/5*3/4 = 6/5 → simplification par 4

B = (-10/-9)/(5/-3)
B = (10/9)*(-3/5)
B = (10*-3)/(9*5)
B = (5*2*-3)/(3*3*5)
B = -2/3