Answer:
A.
-2 + 4 = 2
-5 + 3 = -2
2 + -4 = -2
5 + -3= 2
B.
1. 19
2. -1
3. -2
4. 5
5. -11
Step-by-step explanation:
B.
1. (+9) + (10)
=9+10
=19
2.(+5) + (-6)
= 5-6
=-1
3.(-7) - (-5)
= -7 + 5
= -2
4. (-3) + (+8)
= -3 + 8
= 5
5. (-1) - (10)
= -1 - 10
= -11
