Question

please answer b , c

please please please answer it

Answer 1

MARK ME BRAINLIEST
DIFFRENCE IS -10=
1-11=-10
2-12=-10
3-13=-10

SUM IS 0
0+0
-2+2
-1+1

Answer 2

B]
   a]10-20=10
   b]20-30=10
   c]40-50=10
C]
   1+[-1]=0
   24+[-24]=0
   79+[-79]=0

pls mark it as brainliest