Question

Efectuati:
a) (-13)+(-15)-(+7)+(+10)-(+17)=
b) -8+(-5)+[(-1)+(-7)-(-2+3-5)]=
c) 12+(-13)-[(-7)+(+9)]+[-5+(-6)-(-7)]=
d) -15+{-17-[-11-(-15+13)]-7}=
Va rog!!!!!!(dau coronita)

Answer 1

a) (-13)+(-15)-(+7)+(+10)-(+17)
= -13-15-7+10-17
= -28-7+10-17
= -35+10-17
= -25-17
= -42

b) -8+(-5)+[(-1)+(-7)-(-2+3-5)]
= -8+(-5)+[(-1)+(-7)-(-4)]
= -8+(-5)+(-1-7+4)
= -8+(-5)+(-4)
= -8-5-4
= -13-4
= -17

c) 12+(-13)-[(-7)+(+9)]+[-5+(-6)-(-7)]
= 12+(-13)-(-7+9)+(-5-6+7)
= 12+(-13)+2+(-11+7)
= 12+(-13)+2-4
= 12-13+2-4
= -1+2-4
= +1-4
= -3

d) -15+{-17-[-11-(-15+13)]-7}
= -15+[-17-(-11+2)-7]
= -15+(-17+9-7)
= -15+(-8-7)
= -15-15
= -30