Răspuns:
vezi la explicatie
Explicație pas cu pas:
a. -28-41+18-19+19 = -69+18=-51
b. -39+104+39-24-70=104-24-70=70-70=0
c. 400-157+101-43+99=243+58+99=301+99=400
d. -245+67+13-55+120=-178+13-55+120=191-55+120=136+120=256
e. 651-289+29-11+30=362+29-11+30=391-11+30=380+30=410
f. -876+148+22-14+20=-728+22-14+20=750-14+20=736+20=756
