4) Calcule
a) -8 -2 + 3 =
b) -15 + 8 - 7 =
c) 24 + 6 - 12 =
d) -14-3-6-1 =
e) 4 +5 +6 + 3 - 9 =
f) -1 + 2-4-6-3-8 =
g) 6-8-3-7-5-1 + 0 - 2 =
