Question

Determine as seguintes somas a)(-8)+(+10)+(+7)+(-2) B)(+20)+(-19)+(-13)+(-8) C)(-5)+(+8)+(+2)+(+9) d)(-1)+(+6)+(-3)+(-4)+(-5) e)(+10)+(-20)+(-15)+(+12)+(+30)+-40

Answer 1

a)-8+10+7-2=7

b)20-19-13-8=20

c)-5+8+2+9=14

d)-1+6-3-4-5=-7

e)10-20-15+12+30-40=-23