Question

Calculati:
a) (-7) + (+3)+(-1);
b) |-5|- |+2|+ |-3|- |-1|;
c) 11-[-1+3-(-3+15) - 7];
d)-15+ (-1 + [7-(+14-3)]-7}.

Answer 1

Răspuns:

a) (-7)+(+3)+(-1)=

=-7+3-1=

=-5

b) |-5|-|+2|+|-3|-|-1|=

=5-2+3-1=

=5

c) 11-[-1+3-(-3+15)-7]=

=11-[-1+12-7]=

=11-4=

=7

d) -15+{-1+[7-(+14-3)]-7}=

=-15+{-1+[7-11]-7}=

=-15+{-1+[-4]-7}=

=-15+{-1-4-7}=

=-15+(-12)=

=-15-12=

=-27