Question

A)-2-5-7 =
= -
B) +8 +6 +1 =
C) +6 +3 +4 =
D) -5 -5 -3 =
E) +8 +2 +10=
F) -9 -1-3 =​

Answer 1

A)

$- 2 - 5 - 7 = \\ - ( 2 + 5 + 7) = \\ - (7 + 7) =- 14$

B)

$+ 8 + 6 + 1 = \\ 14 + 1 = 15$

C)

$+ 6 + 3 + 4 = \\ 10 + 3 = 13$

D)

$- 5 - 5 - 3 = \\ - (5 + 5 + 3) = \\ - (10 + 3) = - 13$

E)

$+ 8 + 2 + 10 \\ 10 + 10 = 20$

F)

$- 9 - 1 - 3 = \\ - ( 9 + 1 + 3) = \\ - (10 + 3) = - 13$

Answer 2

_____Calculando____

A)-2-5-7 =

-7 - 7

-14

B) +8 +6 +1 =

8 + 7

15

C) +6 +3 +4 =

9 + 4

13

D) -5 -5 -3 =

-10 - 3

-13

E) +8 +2 +10=

10 + 10

20

F) -9 -1-3 =​

-10 - 3

-13

Respostas:

A) -14

B) 15

C) 13

D) -13

E) 20

F) -13

Bons estudos ;)

Anjinha.