Juste l'exercice 1 svp svp faire apparaître les calcul svp svp merci

A = 48/9 x 7/24
A = 336/216
A = 24 x 14 / 24 x 9
A = 14/9

B = 6/5 x (11/8 + 1/4)
B = 6/5 x (11/8 + 1 x 2 / 4 x 2)
B = 6/5 x (11/8 + 2/8)
B = 6/5 x 13/8
B = 78/40
B = 2 x 39 / 2 x 20
B = 39/20

C = 16/9 - 5/9 x 7/10
C = 16/9 - 35/90
C = 16 x 10 / 9 x 10 - 35/90
C = 160/90 - 35/90
C = 125/90
C = 5 x 25 / 5 x 18
C = 25/18

D = 7/4 x 2/3 + 7 x 4/3
D = 14/12 + 28/3
D = 14/12 + 28 x 4 / 3 x 4
D = 14/12 + 112/12
D = 126/12
D = 6 x 21 / 6 x 2
D = 21/2