Bonjour

Compléter :

64 : ... = -16

... = 64/-16 = (16 x 4)/(-16) = -1/4

64 : (-1/4) = -16

(-525) : .... = 21

... = -525/21 = (-21 x 25)/21 = -25

(-525) : (-25) = 21

2808 : .... = 18

... = 2808/18 = (156 x 18)/18 = 156

2808 : 156 = 18

214 x .... = -26536

... = -26536/214 = (-214 x 124)/214 = -124

214 x (-124) = -26536

Exercice 2 :

a) -53/24 = -2,2

b) -125/-214 = 0,585

Exercice 3 :

7/5 = -21/-15 = 28/20 = 6,3/4,5 = -7,7/-5,5

7/5 = (-3 x 7)/(-3 x 5) = -21/-15

7/5 = (7 x 4)/(5 x 4) = 28/20

7/5 = ?/4,5 => ? = 7 x 4,5 / 5 = 6,3

7/5 = 6,3/4,5

7/5 = (7 x -1,1)/(5 x -1,1) = -7,7/-5,5