Question

(- 1) + ( + 7 ) =
( - 5 ) + ( + 0 ) =
( - 5 ) + ( + 5 ) =
( - 4 ) + ( - 4 ) =

Answer 1

−1+7

=−1+7

=6

−5+0

=−5+0

=−5

−5+5

=−5+5

=0

−4−4

=−4+−4

=−8