Bonjour j'ai besoin d'aide svp -10/21×7/15+7/6 -10/21×(7/15+7/6) 26/-49×-28/13+8/21

Réponse :

Explications étape par étape

Bonjour

-10/21×7/15+7/6

= -7/21 x 10/15 + 7/6

= -1/3 x 2/3 + 7/6

= -2/9 + 7/6

= -4/18 + 21/18

= 17/18

-10/21×(7/15+7/6)

= -10/21(14/30 + 35/30)

= -10/21 x 49/30

= -49/21 x 10/30

= -7/3 x 1/3

= -7/9

26/-49×-28/13+8/21

= 26/13 x 28/49 + 8/21

= 2 x 4/7 + 8/21

= 8/7 + 8/21

= 24/21 + 8/21

= 32/21