Question

resposta das seguintes contas a)(-2) (-1)-(-7) (-4) = b)(-5)+(-6)-(-2)+(-3)=
c)(+9)-(-2)+(-1)-(-3)= d)9-(7)-11=

Answer 1

a)(-2)+(-1)-(-7)+(-4) =
(-3)-(-7)+(-4)
-3+7-4
4-4
0

b)(-5)+(-6)-(-2)+(-3)=
-5-6+2-3
-11+2-3
-9-3
-12
c)(+9)-(-2)+(-1)-(-3)=
9+2-1+3
11-1+3
10+3
13
d)9-(7)-11=
9-7-11
2-11
-9