Question

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

b) (-3 ) + ( + 4 ) =

c) ( + 4) + ( - 6) =

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

e) ( + 1) + ( + 4)=

f) ( -2 )+ ( -1 ) =

g) 7+ ( -1 )=

h) - 6 + ( - 2 ) =

i) 3 + (+4)=

j) 0 + ( -2)

k) 0 + ( +6)=

l) - 1 + ( + 1) =

Answer 1

Bom dia.

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

b) (-3 ) + ( + 4 ) = - 3 + 4 = 1

c) ( + 4) + ( - 6) = 4 - 6 = -2

d) ( + 5) + ( - 6) = 5 - 6 = -1

e) ( + 1) + ( + 4) =  1 + 4 = 5

f) ( -2 )+ ( -1 ) = - 2 - 1 = -3

g) 7+ ( -1 ) = 7 - 1 = 6

h) - 6 + ( - 2 ) = - 6 - 2 = -8

i) 3 + (+4) = 3 + 4 = 7

j) 0 + ( -2) = 0 - 2 = -2

k) 0 + ( +6) = 0 + 6 = 6

l) - 1 + ( + 1) = - 1 + 1 = 0

Regras dos sinais:

+ com + = +
- com - = +
- com + = -
+ com - = -

Bons estudos! :-)