Răspuns:
a) -13+(-10)=-23
b)-20+(-20)+(-20)=-40-20= -60
c)+101+(+301)=101+301=402
d)+17+(+40)+(+13)=17+40+13=70
e)+16+(-30)=16-30= -14
f)-8+(+18)= -8+18= 10
sper ca e corect