Bonsoir ! J'espère vous aider !
Réponse :
Exercice 68 :
A = 4/5 + 3/10
A = 4*2/5*2 + 3/10
A = 8/10 + 3/10
A = 11/10
B = 7/10 + 3/100
B = 7*10/10*10 + 3/100
B = 70/100 + 3/100
B = 73/100
C = 2/21 + 8/7
C = 2/21 + 8*3/7*3
C = 2/21 + 24/21
C = 26/21
D = 5/3 - 20/33
D = 5*11/3*11 - 20/33
D = 55/33 - 20/33
D = 35/33
E = 3/8 + 5/16
E = 3*2/8*2 + 5/16
E = 6/16 + 5/16
E = 11/16
F = 34/63 - 2/9
F = 34/63 - 2*7/9*7
F = 34/63 - 14/63
F = 20/63
G = 4 + 3/7
G = 4*7/1*7 + 3/7
G = 28/7 + 3/7
G = 31/7
H = 48/25 - 1
H = 48/25 - 1*25/1*25
H = 48/25 - 25/25
H = 23/25
I = 8/9 - 3/4
I = 8*4/9*4 - 3*9/4*9
I = 32/36 - 27/36
I = 5/36
