Réponse :
exercice 4
a. 2/3 = 16/24
b. 3/9 = (3*9)/ 81 = 27/81 car 81 = 9*9 * signifie multiplier.
c. 9/7 = (9*7)/ (7*7) = 63/49
d. 1/9 = (1*2) / (9*2) = 2/18
e. 9/6 = (9*4) / (6*4) = 36/24
f. 9/6 = (9*6) / (6*6) = 48 /36
g. 7 = 7/1 = (7*8) / (1*8) = 56 /8
h. 3 = 3/1 = (3*15)/(1*15) = 45/15
i. 6 = 36/6
exercice 5
2/3 = 6/9 = 12/18 = 10/15
3/4 = 6/8 = 21/28
5/6 = 10/12 = 15/18 =20/24
j'espère avoir aidé.
