Question

a) (+5)-(-9)+(-17)=

b) (-7)-(+11)+(+20)=

c) (+12)-(+15)+(+16)-(-8)=

d) (-2)-(-4)-(+7)-(-8)+(-12)=

preciso dos calculos, me ajudem por favor

Answer 1

A) 5+9-17= +3
B) -7-11+20= +2
C)+12-15+16+8= +21 
D)-2+4-7+8-12= -9