Salut tout le monde pourriez vous aider à faire mon exercice car j'ai rencontré beaucoup de difficultés donc je vous demande svp de m'aider cordialement

Réponse :

Explications étape par étape

Bonsoir

A = 1/5 x -4/3 + 7/2

A = -4/15 + 7/2

A = -(4 x 2)/(15 x 2) + (7 x 15)/(2 x 15)

A = -8/30 + 105/30

A = 97/30

B = 4/5 : (-3/7) - 7/10

B = 4/5 x (-7/3) - 7/10

B = -28/15 - 7/10

B = (-28 x 2)/(15 x 2) - (7 x 3)/(10 x 3)

B = -56/30 - 21/30

B = -77/30

C = 13/7 + (-8/7) : (-4/5)

C = 13/7 - 8/7 x (-5/4)

C = 13/7 + 8/4 x 5/7

C = 13/7 + 2 x 5/7

C = 13/7 + 10/7

C = 23/7

D = 7/3 + 3/2 x (-10/21)

D = 7/3 - 10/2 x 3/21

D = 7/3 - 5 x 1/7

D = 7/3 - 5/7

D = (7 x 7)/(3 x 7) - (5 x 3)/(7 x 3)

D = 49/21 - 15/21

D = 34/21

E = 5/8 + (-3/4) : (-9/16)

E = 5/8 + 3/4 x 16/9

E = 5/8 + 16/4 x 3/9

E = 5/8 + 4 x 1/3

E = 5/8 + 4/3

E = (5 x 3)/(8 x 3) + (4 x 8)/(3 x 8)

E = 15/24 + 32/24

E = 47/24

F = 6/5 - (-1/9) x (-3/4)

F = 6/5 - (3/9) x 1/4

F = 6/5 - 1/3 x 1/4

F = 6/5 - 1/12

F = (6 x 12)/(5 x 12) - (1 x 5)/(12 x 5)

F = 72/60 - 5/60

F = 67/60