Answer:
Number 1 is 1
Number 2 is -1
Number 3 is 1
Number 4 is 5 (add the opposite of the negative number)
Number 5 is -5 (same as number 4 explaination)
Number 6 is 1 (if they are both negative, you add the opposite of the second number if that is negative)
Explanation:
Hope this helps! :D