Répondre :
7/9-1/9 * 3/2=6/9*3/2
=6*3/9*2
=0
5/2*(7/9+9/2)
=5/2(7*2/4*2+9*4/2*4)
=5/2(14/8+36/8)
=5/2*50/8
=5*5*2*5/2*8
=15/8
Qui peut m'aider a calculer 7/9 - 1/9 x 3/2 et 5/2 * (7/4 + 9/2)
7/9-1/9 * 3/2=6/9*3/2
=6*3/9*2
=0
5/2*(7/9+9/2)
=5/2(7*2/4*2+9*4/2*4)
=5/2(14/8+36/8)
=5/2*50/8
=5*5*2*5/2*8
=15/8