Pour les exercice 27 a 34 calculer chaque produit simplifier éventuellement puis controler avec la calculatrice merci a se qui vont m'aider svp ps: * cette etoi

Bonjour

1er exercice

a.3/5 * 7/2  = 21/10

b. 1/4 * 3/5 = 3/20

c. 9/7 * 7/9 = 1

2éme exercice

a. _1/5 * 5/_3  = 5/15 = 1/3

b. _3/5 * 7/9 = -21/45 = -7/15

c. _5/_4 * 2/15 = 10/60 = 1/6

3éme exercice

a. 6/5 * 11/4 = 66/20 = 33/10

b. _9/5 * 7/6 = -63/30 = -21/10

c. _10/9 * _7/15 = 70/135 =14/27

Bonsoir,

Exo 1 :

a. 3/5 * 7/2 = (3*7)/(5*2) = 21/10

b. 1/4 * 3/5 = (1*3)/(4*5) = 3/20

c. 9/7 * 7/9 = (9*7)/(7*9) = 63/63 = 1

Exo 2 :

a. -1/5 * 5/-3 = (-1*5)/(5*-3) = -5/-15 = 1/3

b. -3/5 * 7/9 = (-3*7)/(5*9) = -21/45 = -7/15

c. -5/-4 * 2/15 = (-5*2)/(-4/15) = -10/-60 = 1/6

Exo 3 :

a. 6/5 * 11/4 = (6*11)/(5*4) = 66/20 = 33/10

b. -9/5 * 7/6 = (-9*7)/(5*6) = -63/30 = -21/10

c. -10/9 * -7/15 = (-10*-7)/(9*15) = 70/135 = 14/27

Bonne soirée