Answer :
For question 1:
+5 + (-8)
= +5 -8
= -3
For question 3:
-9 + (-2)
= -9 -2
= -11
For question 5;
+4 + (-1)
= +4 - 1
= 3
+5 + (-8)
= +5 -8
= -3
For question 3:
-9 + (-2)
= -9 -2
= -11
For question 5;
+4 + (-1)
= +4 - 1
= 3