Explications étape par étape :
a) 3 x (-2) + 6 x (-5)
= -6 - 30
= -36
b) -8 (4 + 3 x 2 ) + (-1)
= -8 (4 + 6) + (-1)
= -8 x 10 + (-1)
= -80 - 1
= -81
c) (-14 + 5) : (-2)
= -9 : (-2)
= -4,5
d) -1 x (-2) -(-3) x 4 / 1 + 16 + (-2)
= 2 + 12 / 17 + (-2)
= 14 / 15