A=12+7x5-18
A= 12 + 35 - 18
A=47 - 18
A= 29
B=(19-11)x7-21
B= 8x7-21
B= 56-21
B= 35
C= 100-7x9+40-4x9
C= 100-63+40-4x9
C= 100-63+40-36
C=37+40-36
C=37+4
C=41
D=6x(20-4x3)+52
D=6x(20-12)+52
D=6x6+52
D=36+52
D=88
E=(17+5x9)x(50-6x8)
E=(17+45)x(50-48)
E=62x2
E=124
BONNE JOURNÉE :)