b). (+15) + (−13) + (-3) =
c) (-10) + (+13) + (−16) + (+19) =
d). (+12) + (−11) + ( + 9) + ( + 7) =
e). (+5)+(+3)=
f). (+4)+(-2)=
g). (-6)+(-1)=
h). (-6)+0=
i). (-10)+(-30)=
j). (-15)+(-5)=​