A=-7sur12 +1sur4-5sur18=-11 sur 18 comment simplifier le résultat .svp

Bonsoir !

7/12+1/4-5/18 = 11/18

Dénominateur commun 36

7/12 = 7x3/12x3 = 21/36

1/4 = 1x9/4x9 = 9/36

5/18 = 5x2/18x2 = 10/36

Somme des fractions :

21/36+9/36+10/36 = 40/36

Simplification :

40/36 = 40:4/36:4 = 10/9

Bon courage.