salut aidez moi svp et merci​

Réponse :

bonjour

Explications étape par étape :

a. 2/7 - 10/7 x 14/5

=2/7 -2x2

=2/7-4

=2/7-28/7

=-26/7

b.7/10x13/14x-5/26

=1/2 x1/2x-1/3

=-1/8

c. -5/3 /(2/3-4/9)

=-5/3 / (6/9-4/9)

=-5/3 / 2/9

=-5/3 x 9/2

=-5x3/2

=-15/2

d. (1/11+1/22)/-9/22

=2/22+1/22) / -9/22

=3/22  x -22/9

=-1/3

e.-7 /(21/2x-3/2)

=-7/ -63/4

=-7x-4/63

=-1x-4/9

=4/9

f. (1-1/3-3/5x2/3)x1/2

=(1 -1/3 -1/5x2)x1/2

=(1-1/3-2/5) x1/2

=15/15-5/15-6/15)x1/2

=4/15x1/2

=2/15