Bonsoir vous pouvez m’aidez à faire mes exercice de 5e svp

Exercice 1 :

1/

7÷4

2/

• 0,9

• 0,5

• 0,25

• 0,2

Exercice 2 :

A = 2/3 + 8/3 B = 9/4 - 5/4

A = 2 + 8/3 B = 9-5/4

A = 10/3 B = 4/4

C = 1 - 4/7 D = 6 + 1/7

C = 7/7 - 4/7 D = 6/1 + 1/7

C = 7-4/7 D = 6×7/1×7 + 1/7

C = 3/7 D = 42/7 + 1/7

D = 47+1/7 = 43/7

E = 3/4 - 3/8 F = 5/9 + 11/63

E = 3×2/4×2 - 3/8 F = 5×7/9×7 + 11/63

E = 6/8 - 3/8 F = 35/63 + 11/63

E = 6+3/8 F = 35 + 11/63

E = 9/8 F = 46/63

G = 2/3 + 3/5 H = 11 × 5/6

G = 2×5/3×5 + 3×3/5×3 H = 11/1 × 5/6

G = 10/15 + 9/15 H = 11×6/1×6 × 5/6

G = 10+9/15 H = 66/6 × 5/6

G = 19/15 H = 66×5/6×6

H = 11×5/6×11

H = 55/66

Exercice 3 :

J = 1 + 9×7

J = 1 + 63

J = 64

K = 3 + 7×8 + 2

K = 3 + 56 + 2

K = 61

L = 4 + 6×(10-3)

L = 4 + 6×7

L = 4 + 42

L = 46

Exercice 4 :

M = 2/7 + 3/7 × 4

M = 2/7 + 3/7 × 4/1

M = 2/7 + 3/7 × 4×1/1×7

M = 2/7 + 3/7 × 28/7

M = 2/7 + 3×28/7×7

M = 2/7 + 3×4/4×7

M = 2/7 + 12/28

M = 2×4/7×4 + 12/28

M = 8/28 + 12/28

M = 8+12/28

M = 20/28

N = 13/3 - 5 × 3/4

N = 13/3 - 5/1 × 3/4

N = 13/3 - 5×3/1×3 × 3/4

N = 13/3 - 15/3 × 3/4

N = 13-15/3 × 3/4

N = 2/3 × 3/4

N = 2×4/3×4 × 3×3/4×3

N = 8/12 × 9/12

N = 8×9/12×12

N = 72/144

P = 1 + 2 × 5/3

P = 3 × 5/3

P = 3/1 × 5/3

P = 3×3/3×1 × 5/3

P = 9/3 × 5/3

P = 9×5/3×3

P = 3×5/3×3

P = 15/9

Exercice 5 :

Karim a manger : 5/12

Kévin a manger ( le reste ) : 12/12 - 5/12

12-5/12

7/12

Kévin a mangé sept douzième de la boîte a chocolat.

( Comme je te l'ai dit j'ai pas réussi la 6 mais voilà le reste, j'espère que ça ta aider et que je fait d'erreur nul part ^^).