Question

Pls explain for each answer you pick pls

Answer 1

So here is how it would go

• -12+12 = 0
• 8+(-8) = 0
• -5+-5 = -10
• -20+20 = 0
• -2000+2000 = 0

Answer 2

all except the third selection are 0.

-12+12= 0
8+(-8)=0
-5+-5= -10
-20+20=0
-2,000+2,000=0

follow the the rules of integers