bonjour,
A = 3 + 5 x ( - 4) + 8
= 3 - 20 + 8
= - 20 + 11
= - 9
B = - 2 x ( 5 + 3 x ( -2))
= - 2 x ( 5 - 6 )
= - 2 x - 1
= 2
C = - 2 + ( 12 : ( - 3) ) = - 2 - 4 = - 6
D = ( 15 - 9 ) x ( - 5) = 6 x ( - 5) = - 30
E = ( - 6 + 4 ) : ( 4 - ( -6) ) = - 2 : ( 4 + 6 ) = - 2 : 10 = - 0.2
