11-10-(     )=0

(     )-7-5=0

(     )-7-3=4

11-(     )-6=5

14-(     )-0=11

(     )-12-0=4

18-(     )-8=6

(     )-5-2=4

17-11-(     )=1

20-10-(     )=6

15-(     )-0=2

13-(     )-1=7

13-2-(     )=5

11-(     )-5=0

15-(     )-4=7

(     )-10-0=10

20-0-(     )=7

17-13-(     )=1

13-0-(     )=12

19-(     )-6=6

14-(     )-5=3

13-(     )-1=0

(     )-8-3=1

11-(     )-1=5

(     )-7-4=0

11-(     )-1=3

11-5-(     )=5

12-8-(     )=3

16-(     )-12=3

(     )-1-5=9

14-(     )-4=0

(     )-1-12=4

14-(     )-8=2

20-(     )-0=20

16-11-(     )=0

15-14-(     )=1

15-0-(     )=11

11-(     )-11=0

(     )-14-5=0

17-(     )-5=10

13-(     )-3=6

13-7-(     )=3

17-14-(     )=2

(     )-7-10=2

(     )-6-1=5

(     )-10-1=0

(     )-13-1=0

(     )-0-11=8

(     )-11-1=0

11-9-(     )=1