Question

efetuem no caderno estás adições.

a) ( -5 ) + ( +2 ) =
b) ( +3 ) + ( 4 ) =
c) 0 + ( -5 ) =
d) ( -2 ) - ( -2 ) =
e) ( -3 ) + ( +3 ) =
f) ( +2 ) - 0 =
g) ( +4 ) + ( -6 ) =
h) ( -9 ) + ( +7 ) =
i) ( -3 ) + ( -4 ) =
j) ( +3 ) + 0 =
k) ( +6 ) + ( +1 ) =
l) ( +5 ) + ( -4 ) =​

Answer 1

Explicação:

Sinais iguais positivo sinais diferentes negativo

a) ( -5 ) + ( +2 ) = -3

b) ( +3 ) + ( 4 ) = +7

c) 0 + ( -5 ) = -5

d) ( -2 ) - ( -2 ) = 0

e) ( -3 ) + ( +3 ) = 0

f) ( +2 ) - 0 = +2

g) ( +4 ) + ( -6 ) = -2

h) ( -9 ) + ( +7 ) = -2

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

j) ( +3 ) + 0 = 3

k) ( +6 ) + ( +1 ) = +7

l) ( +5 ) + ( -4 ) = +1