bonsoir
A = 12/5 - 3/5 x 7/9
A = 12/5 - 21/45
A = 108/45 - 21 /45
A = 87/45
A = 29 / 15
B = ( 2/3 - 3 ) : 1/9
B = ( 2/3 - 9/3 ) : 1 /9
B = - 7/3 x 9
B = - 63/9 = - 7
Réponse:
A=12/5-3/5*7/5
12-3/5*7/5
9/3*7/5
2/1*7/5
10/7
