E=31sur25 F=4sur21 G=11sur6

Réponse:

Bonsoir,

E = 5/10 + 74/100

E = (5×10)/(10×10) + 74/10

E = 50/100 + 74/100

E = 124/100

E = 31/25

F = -5/21 + 3/7

F = -5/21 + (3×3)/(7×3)

F = -5/21 + 9/21

F = 4/21

G = 7/12 + 5/4

G = 7/12 + (5×3)/(4×3)

G = 7/12 + 15/12

G = 22/12

G = 11/6

Bonne soirée !