Sagot :
A= 16 - 7 x 8
= 16 - 56 = -40
B= (16-7) x 8
= 9 x 8 = 72
C= 9x3 - 4x8
= 27 - 32 = -5
D= 9 x (3-4) x 8
= 9 x (-1) x 8
= -9 x 8 = -72
A = -40 , 7*8 = 56 ; 16 - 56 = -40
B : 16 - 7 = 9 , 9 * 8 = 72
C : 27 - 32 = -5
D = 9*8* (-1)
= 72 * -1
=-72