Answer:
a. 36
b. 4
c. -11
d. 2
e. -20
Step-by-step explanation:
20 + 16 = 36
20 + (-16)
20 - 16 = 4
5 + (-16)
5 - 16 = -11
-9 + 11
11 - 9 = 2
-9 + (-11)
-9 - 11 = -20
