Sagot :

ephtamina890

A)3/8+(-5/6)

=(18-40)/48

=-22/48

=(-22÷2)/(48÷2)

=-11/24

B)(-10/3)×(-18/35)

=-(10×18)/(35×3)

=-180/105

=-(180÷15)/(105÷15)

=-12/7

C)10/7÷5/3

=10/7×3/5

=(10×3)/(7×5)

=30/35

=(30÷5)/(35÷5)

=6/7

selimaneb7759

Réponse :

Explications étape par étape :

Bonsoir

somme de 3/8 et -5/6

A = 3/8 - 5/6 = 9/24-20/24 = -11/24

produit de -10/3 et - 18/35

B = (-10/3) × (-18/35) = (10 × 18)/(3×35)

B = (2×5×3×6)/(3×7×5) = 12/7

C = (10/7 ) /  (5/3) = (10/7) × (3/5)

C = (10×3)/(7×5) = (2×5×3)/(7×5)=6/7

C = 6/7