Question

2. Calculaţi:
a) (-7) + (+3) + (-1);
b) -51 - 1+2] + |-31 -- -11;
c) 11-1-1+3-(-3+15) - 71;
d) -15+{-1 + [7 - (+14-3)]-7}.

Answer 1

a) -7+3-1= -4-1=-5

b) nu se înțelege

c) 9+3-12-71= 12-83= -71

d) -15+[-1+(7-11-7)]= -15+(-1-11)= -15-12= -27