Sagot :
bonjour
A = - 4/3 x - 3/5 = 12 /15 = 4/5
B = - 42/12 x 4/7 = - 168/84 = - 2
C = 16 /7 : 20 /21
= 16/7 * 21 /20
= 336/140
= 12 / 5
D = 3/5 * 10/6 * - 1/4
D = - 30 / 120
D = - 1 /4
la E est coupée
Bonjour !
A = 4/-3 x -3/5 =>on simplifie :
par (-3) on aura un résultat de 4/5
B= 42/-12x4/7 =6/3×-1/1 = -6/3=-2
C = 16/7:20/21= 16/7*21/20 =>
4/1 x 3/5 = 12/5
D = 3/5×6/10×-1/4 = 30/30 1/=1×-1/4=-1/4
= - 1/4
Bon courage.