A. 12:4x3 = 12:4=3 =3x3= 9
donc réponse 9
B. 40:5x2 = 40:5= 8 = 8x2= 16
C. 5x4:2= 5x4=20 = 20:2=10
D. 4x10:2x5= 4x10=40 = 40:2=20 =20x5= 100
E. 50:10:5 = 50:10= 5 = 5:5= 1
F. 50:10x10 = 50:10= 5 = 5x10= 50
G. 50 x 10 x 5 = 50 x 10= 500 = 500x5= 2500
H. 50x10:10 = 50x10= 500 = 500:10= 50
Voilà
