help s'il vous plait ex32 et 33

N) 32

A = -18+20 =2

B = -16 + (-36) = -16+36 = -42

d= -55-(-36) = -55+36 = -19

c= -30+(-28) = -30-28 = -58

N)33

a = -18+20=2

b= -16-36 = -52

c = -30-28=-58

d = 4.5+(-10) = 4.5-10=-5.5