J arrive pas a cet exo pouver vous m aider !?

A = 4+12x8
A = 100

B = (4+12) x 8
B = 128

C = 4x12x8
C = 384

D = 4+ 12/8
D = 32/8 + 12/8
D = 44/8
D = 11/2

E = 4+12 / 8
E = 16/8
E = 2

F = 4 / 12+8
F = 4/20
F = 1/5

G = 12-8 / 4
G = 1

H = 4- 12/8
H = 32/8 - 12/8
H = 20/8
H = 5/2

I = 12 / 8-4
I = 12/4
I = 3

a. = 4+12×8
= 4+96
= 100

b. = (4+12)×8
= 16×8
= 128

c. = 4×12×8
= 48×8
= 384

d. = 4+12/8
=11/2

e. = 4+12/8
= 16/8

f. = 4/12+8
= 4/28

g. = 12-8/4
= 4/4 donc 1

h. = 4-12/8
= 5/2

i. = 12/8-4
= 12/4

Remplacer les "/" par des barres de fractions.