8+ =35-20 9+ =57-40 6+ =24-10 18- =29-20 12- =60-56 11- =95-90 -8=36-30 -7=49-43 ...

Question

8+ =35-20

9+ =57-40

6+ =24-10

18- =29-20

12- =60-56

11- =95-90

-8=36-30

-7=49-43

-5=18-9

Answer 1

1)7 

2)8

3)8

4)9

5)8

6)6

7)-2

8)-1

9)4