Question

a) (-5)+(+2)-(-1)+(-7)=
b)(+2)-(3)+(-5)-(-9)=
c)(-2)+(-1)-(-7)+(-4)=
d)(-5)+(-6)-(-2)+(-3)=
e)(+9)-(-2)+(-1)-(-3)=
f)9-(-7)-11=
g)-2.(-1)-6=
h)-(+7).4-12=
i)15-(+9)+(-2)°=
j)[-25:(-5)]-30=​

Answer 1

Explicação passo-a-passo:

a) (-5)+(+2)-(-1)+(-7)=

- 5 + 2 + 1 - 7

- 3 - 6 = - 9

b)(+2)-(3)+(-5)-(-9)=

2 - 3 - 5 +9 =

- 1 + 4 = 3

c)(-2)+(-1)-(-7)+(-4)=

- 2 - 1 + 7 - 4=

- 3 + 3 =0

d)(-5)+(-6)-(-2)+(-3)=

- 5 - 6 + 2 - 3=

- 11 - 1 = - 12

e)(+9)-(-2)+(-1)-(-3)=

9 + 2 - 1 + 3 =

11 + 2 = 13

f)9-(-7)-11=

9 + 7 - 11=

16 - 11 = 5

g)-2.(-1)-6=

2 - 6= - 4

h)-(+7).4-12=

-28 - 12 = - 40

i)15-(+9)+(-2)=

15 - 9 - 2=

6 - 2 = 4

j)[-25:(-5)]-30=

5 - 30 = - 25