Question

Resolva as expressões a)-12+8-9+2-6 b)+15-5-3+1-2 c)+4+10+8

Answer 1

a)(-12+8=-4)-9+(2-6=-4)=-4-9-4=17
b)(15-5=10)-3+(1-2=-1)=10-3-1=6
c)(4+10=14)+8=14+8=22