Réponse :
74/
a. -16/7 x -1/4 = 16/28 = (2x8)/(2x14) =(2x4)/(2x7) = 4/7
b. 5/-6 x 2/3 = 10/-18 = (2x5)/(2x-6) = 5/-6
c. 9/2 x 7/-18 = 63/-36 = 7/-4
d. 5/4 x -2/-15 = -10/-60 = 1/6
e. -2/3 x 3/10 = -6/30 = -1/5
f. 8/5 x -7/24 = -56/120 = (-14 x 4)/(30 x 4) = (-2 x 7)/(-2 x -15) =7/-15
45/
a. 48/69 x 23/96 = 1106/6574 = 553/3287
b. 54/51 x 17/9 = 918/459 = 34/17
c = 63/28 x 56 x 45 = 3528/1260 = 392/140 = 98/35
Explications étape par étape
