Va rog ajutati-ma !!!!!!!!!!!!!!

Răspuns:
a) -3-20 = -23
b) 6-6 = 0
c) 7-12 = -5
d) -15-10 = -25
e) 6+12 = 18
f) -6+16 = 10
g) -15+6 = -9
h) 4+5 = 9