aidez moi svp pour le exéresis 10 svp pour domain​

Bonjour

a. 5/6 + 7/18

= (5 x 3) / (6 x 3) + 7/18

= 15/18 + 7/18

= 22/18

= (2x 11) / (2 x 9)

= 11/9

b. 7/3 - 1/12

= (7 x 4) / (3 x 4) - 1/12

= 28/12 - 1/12

= 27/12

= (3 x 9) / (3 x 4)

= 9/4

c. 11/20 + 3/4

= 11/20 + (3 x 5) / (4 x 5)

= 11/20 + 15/20

= 36/20

= (4 x 9) / (4 x 5)

= 9/5

d. 23/18 - 8/18

= 15/18

= (3 x 5) / (3 x 6)

= 5/6.