Réponse :
Bonjour
Explications étape par étape
A = -13/8 +7/16
A = -13/8 X 2/2 +7/16
A = -26/16 +7/16
A = -19/16 oui c'est juste
B = 7/35 +8/15
B = 7/35 X 15/15 +8/15 X 35/35
B = 105/525 + 280/525
B = 385/525
B = 77/105 oui, c'est juste
C = 11/26 -5/39
C = 11/26 X 39/39 -5/39 X 26/26
C = 429/1014 - 130/1014
C = 299/1014 irréductible
D = 7/11 +4/25
D = 7/11 X 25/25 +4/25 X 11/11
D = 175/275 + 44/275
D = 219/275 oui, c'est juste
E = 3/12 -5/18 +1
E = 3/12 X 18/18 -5/18 X 12/12 +1 X 216/216
E = 54/216 - 60/216 +216/216
E = -6/216 +216/216
E = +210/216
E = 105/108
E = 35/36
F = -5/4 +2/3 --7/5
F = -5/4 X 15/15 +2/3 X 20/20 +7/5 X 12/12
F = -75/60 +40/60 +84/60
F = +49/60
Exo 5
G = 44/105 X 42/66
G = 1848/6930
G = 308/1155
H = 63/30 X 45/28
H = 2835/840
H = 945/280
H = 189/56
J = 24/35 X 14/36
J = 336/1260
J = 56/210
J = 28/105
