a) =5+2=7
b) =5-4=1
c) = -10+3= -7
d) =8-(-6)= 8+6= 14
e) =3+7=10
f) =11-2*3=11-6=5
g) = 9-7= 2
h) 4*6-(-12)= 24+12 = 36
